英语 英语 日语 日语 韩语 韩语 法语 法语 德语 德语 西班牙语 西班牙语 意大利语 意大利语 阿拉伯语 阿拉伯语 葡萄牙语 葡萄牙语 越南语 越南语 俄语 俄语 芬兰语 芬兰语 泰语 泰语 泰语 丹麦语 泰语 对外汉语

香蕉为什么容易发黑腐烂?

时间:2015-11-25 05:47来源:互联网 提供网友:yajing   字体: [ ]
特别声明:本栏目内容均从网络收集或者网友提供,供仅参考试用,我们无法保证内容完整和正确。如果资料损害了您的权益,请与站长联系,我们将及时删除并致以歉意。
    (单词翻译:双击或拖选)

Y: So Don, yesterday I was walking down the produce aisle1 when I saw it--long, ripe,yellow. The perfect banana. It really looked delicious and I had to have it. I took it home and hung it on a banana hanger2. The very next morning, it developed nasty brown spots.

D: And you're wondering what gives.
Y: Right. It was a good banana yesterday. What happened?
D: It's no mystery, Yael. Those spots are a natural part of the ripening4 process. You see, just like all fresh produce, your bananas are alive.They're taking in oxygen to help them convert sugars into energy, and releasing carbon dioxide. This process is called respiration5.
Y: I don't know, Don, this banana looks dead to me.
D: Now, the quicker a fruit or vegetable respires, the quicker it ripens6. For most fruits,the respiration rate slows down after the initial growth stage and the fruit ripens slowly. The growth and ripening process of bananas, however, is different. Although at first the banana's respiration slows down too, when it's ready to ripen3, the banana's pulp7 releases a chemical that increases respiration. This converts the starches8 in the banana to sugars and gives it its fabulous9 taste. And you know how good bananas taste!
Y: Watch it--you're drooling. But what does all this ripening have to do with spots?
D: Well, with all this respiration, the banana eventually processes all the starches available. And that's when it begins to die. Those brown spots are rot and decay.
Y: Poor thing. It just ran out of fuel.
D: Yeah, it's never easy seeing a good banana go bad.

点击收听单词发音收听单词发音  

1 aisle qxPz3     
n.(教堂、教室、戏院等里的)过道,通道
参考例句:
  • The aisle was crammed with people.过道上挤满了人。
  • The girl ushered me along the aisle to my seat.引座小姐带领我沿着通道到我的座位上去。
2 hanger hanger     
n.吊架,吊轴承;挂钩
参考例句:
  • I hung my coat up on a hanger.我把外衣挂在挂钩上。
  • The ship is fitted with a large helicopter hanger and flight deck.这艘船配备有一个较大的直升飞机悬挂装置和飞行甲板。
3 ripen ph3yq     
vt.使成熟;vi.成熟
参考例句:
  • I'm waiting for the apples to ripen.我正在等待苹果成熟。
  • You can ripen the tomatoes on a sunny windowsill.把西红柿放在有阳光的窗台上可以让它们成熟。
4 ripening 5dd8bc8ecf0afaf8c375591e7d121c56     
v.成熟,使熟( ripen的现在分词 );熟化;熟成
参考例句:
  • The corn is blossoming [ripening]. 玉米正在开花[成熟]。 来自《现代汉英综合大词典》
  • When the summer crop is ripening, the autumn crop has to be sowed. 夏季作物成熟时,就得播种秋季作物。 来自《简明英汉词典》
5 respiration us7yt     
n.呼吸作用;一次呼吸;植物光合作用
参考例句:
  • They tried artificial respiration but it was of no avail.他们试做人工呼吸,可是无效。
  • They made frequent checks on his respiration,pulse and blood.他们经常检查他的呼吸、脉搏和血液。
6 ripens 51963c68379ce47fb3f18e4b6ed340d0     
v.成熟,使熟( ripen的第三人称单数 )
参考例句:
  • The sun ripens the crops. 太阳使庄稼成熟。 来自《简明英汉词典》
  • Then their seed ripens, and soon they turn brown and shrivel up. 随后,它们的种子熟了,不久就变枯萎。 来自辞典例句
7 pulp Qt4y9     
n.果肉,纸浆;v.化成纸浆,除去...果肉,制成纸浆
参考例句:
  • The pulp of this watermelon is too spongy.这西瓜瓤儿太肉了。
  • The company manufactures pulp and paper products.这个公司制造纸浆和纸产品。
8 starches 4a2ff941018a19601cc0790704781df1     
n.淀粉( starch的名词复数 );含淀粉的食物;浆粉v.把(衣服、床单等)浆一浆( starch的第三人称单数 )
参考例句:
  • You should avoid sugars and starches. 你应避免吃糖和含淀粉的食物。 来自《简明英汉词典》
  • Cotton and rayon yarns are most often sized with water-insoluble starches. 棉和人造丝纱多用不溶于水的淀粉上浆。 来自互联网
9 fabulous ch6zI     
adj.极好的;极为巨大的;寓言中的,传说中的
参考例句:
  • We had a fabulous time at the party.我们在晚会上玩得很痛快。
  • This is a fabulous sum of money.这是一笔巨款。
本文本内容来源于互联网抓取和网友提交,仅供参考,部分栏目没有内容,如果您有更合适的内容,欢迎点击提交分享给大家。
------分隔线----------------------------
TAG标签:   英语听力  听力材料  听力提高
顶一下
(0)
0%
踩一下
(0)
0%
最新评论 查看所有评论
发表评论 查看所有评论
请自觉遵守互联网相关的政策法规,严禁发布色情、暴力、反动的言论。
评价:
表情:
验证码:
听力搜索
推荐频道
论坛新贴