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Grammar Girl here. Today’s topic is “cement” versus1 “concrete.”
Guest writer Sal Glynn writes:
Accuracy is important. You might think concrete and cement are interchangeable, but you'll quickly find that you're mistaken when some guy at Home Depot2 rolls his eyes at you when you ask for the wrong thing. And if you're writing instructions for someone and you use the wrong word, it'll be your fault when things don't go so well. Yes, “cement,” and “concrete” have completely different meanings (1), and knowing what they are helps you use them well and maintain your dignity in home improvement stores.
The History of Cement and Concrete
Cement comes from the Latin word “caementum,” meaning rough-cut stone, while concrete is from the Latin word “concretus,” meaning to grow together or harden. Both words wandered through Middle English until they met in 1756, when John Smeaton used his version of cement in rebuilding the Eddystone lighthouse.
In 1824 Joseph Aspdin patented “Portland cement,” a powder made of limestone3 and clay. He called it Portland cement because when it was mixed with sand, gravel4, pebbles5, bits of rock, and water, the resulting dried concrete resembled the limestone from the English Isle6 of Portland.
This is the division: cement is a powder that is mixed with other materials and water to create the solid mass known as concrete. There is no such thing as a cement overpass7, a cement porch, or a cement pond. These are all concrete. If you stub your toe on concrete you'll yell like a Cretin. Get it? Concrete. Cretin.
And in case you were wondering, pavement is also not concrete. Pavement is a solid material made of sand, gravel, or crushed stone much like concrete, but the cement binder9 is replaced with asphalt or tar10.
Uses and Abuses of Concrete
Cement does have other meanings that don't relate to construction, for example,
Henrik and Daphne cemented their relationship by exchanging nose rings.
The transitive verb “cemented” means to bind8 or join together. Henrik and Daphne swap11 nose rings to show they are more than casual friends.
The idiomatic12 use of “cement” to mean “determined or unalterable” is wrong. For example, it would be wrong to say
Daphne’s opinions about firearm safety and tattoos13 were set in cement.
At best, that means Daphne’s opinions were set in powder. Since she refused to be swayed, her opinions were set in concrete.
That Other Kind of Concrete
Outside of building materials, “concrete” is the opposite of “abstract,” and means actual or specific things. An automobile14 is concrete, while justice is abstract. Here's how you'd use it in a sentence:
Henrik talked about building a summer home, but none of his plans were concrete.
Plans are abstract when they aren't specified15 or put in motion. Henrik needs to make a decision and get to work instead of sitting around talking.
[Web Bonus] More Concrete for the Curious
The French avant-garde “musique concrète” (2) began in the late 1940s with composer Pierre Schaeffer. The music ignores the abstract of sharps and clefs in composition and instead uses sound from objects like tin cans to power drills. These are recorded on tape and altered to create music. Noted16 recent composers in this genre17 include Steve Reich, Negativland, and Frank Zappa.
Concrete poetry (3) does away with old stuff like straight lines and syntax, and sets the words in kinetic18 aggregate19 of collage20, different typefaces, graphics21, and calligraphy22 to create levels of meaning not previously23 available from the printed page. Scottish artist and poet Ian Hamilton Finlay sculpts24 his concrete poems. For more on concrete poetry, visit the Sackner Archive of Concrete and Visual Poetry at www.rediscov.com/sacknerarchives/
Now that you understand the difference between cement and concrete, remember the quick and dirty tips is that you cement things together, and stub your toe on concrete.
Pet Peeve25 of the Year Contest
In a month or so I'll be announcing the Grammar Girl Pet Peeve of the Year, and it will be based entirely26 on your input27. Let me know what irritated you the most about language in 2008 by leaving a comment on the transcript28 for this episode at QuickandDirty Tips.com. It can be anything -- a phrase, a new word, an omission29 – whatever it was that stood out to you as a problem with language this year. Again, leave a comment in the transcript at QuickAndDirtyTips.com.
The Dog Walked Down the Street: An Outspoken30 Guide for Writers Who Want to Publish
This episode was written by guest-writer Sal Glynn, the author of the award-winning book The Dog Walked Down the Street, An Outspoken Guide for Writers Who Want to Publish. Find out more about Sal at his blog,。。。And I'm Mignon Fogarty, author of the paperback31 book Grammar Girl's Quick and Dirty Tips for Better Writing, which makes a lovely and affordable32 gift. I think books in general make great gifts. I often to give books. But I guess that wouldn't surprise anyone!
That's all. Thanks for listening.
1 versus | |
prep.以…为对手,对;与…相比之下 | |
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2 depot | |
n.仓库,储藏处;公共汽车站;火车站 | |
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3 limestone | |
n.石灰石 | |
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4 gravel | |
n.砂跞;砂砾层;结石 | |
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5 pebbles | |
[复数]鹅卵石; 沙砾; 卵石,小圆石( pebble的名词复数 ) | |
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6 isle | |
n.小岛,岛 | |
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7 overpass | |
n.天桥,立交桥 | |
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8 bind | |
vt.捆,包扎;装订;约束;使凝固;vi.变硬 | |
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9 binder | |
n.包扎物,包扎工具;[法]临时契约;粘合剂;装订工 | |
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10 tar | |
n.柏油,焦油;vt.涂或浇柏油/焦油于 | |
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11 swap | |
n.交换;vt.交换,用...作交易 | |
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12 idiomatic | |
adj.成语的,符合语言习惯的 | |
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13 tattoos | |
n.文身( tattoo的名词复数 );归营鼓;军队夜间表演操;连续有节奏的敲击声v.刺青,文身( tattoo的第三人称单数 );连续有节奏地敲击;作连续有节奏的敲击 | |
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14 automobile | |
n.汽车,机动车 | |
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15 specified | |
adj.特定的 | |
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16 noted | |
adj.著名的,知名的 | |
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17 genre | |
n.(文学、艺术等的)类型,体裁,风格 | |
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18 kinetic | |
adj.运动的;动力学的 | |
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19 aggregate | |
adj.总计的,集合的;n.总数;v.合计;集合 | |
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20 collage | |
n.拼贴画;v.拼贴;把……创作成拼贴画 | |
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21 graphics | |
n.制图法,制图学;图形显示 | |
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22 calligraphy | |
n.书法 | |
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23 previously | |
adv.以前,先前(地) | |
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24 sculpts | |
雕刻( sculpt的第三人称单数 ); 雕塑; 做(头发); 梳(发式) | |
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25 peeve | |
v.气恼,怨恨;n.麻烦的事物,怨恨 | |
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26 entirely | |
ad.全部地,完整地;完全地,彻底地 | |
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27 input | |
n.输入(物);投入;vt.把(数据等)输入计算机 | |
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28 transcript | |
n.抄本,誊本,副本,肄业证书 | |
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29 omission | |
n.省略,删节;遗漏或省略的事物,冗长 | |
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30 outspoken | |
adj.直言无讳的,坦率的,坦白无隐的 | |
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31 paperback | |
n.平装本,简装本 | |
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32 affordable | |
adj.支付得起的,不太昂贵的 | |
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