Learned Words and popular Words

Diamonds, as they are found, do not look very impressive. They are gray, greasy-looking pebbles2. Experienced diamond miners can tell(distinguish) a diamond immediately. But some people have carried around(about) an unusual pebble1 for weeks before finding out that they had got a diamond.   LESSoN NINE     TEXT  A          Learned Words and popular Words       In every cultivated language there are two great classes of words which, (taken together, ---过去分词短语作条件状语，相当于if the two great classes of words are taken together)make up the whole vocabulary.           Could you tell A from B?   Cultivate ----cultivation   Well-cultivated   Stock market---stock exchange   Educate---education---educated   Well-educated   Be acquaint with   Informal   High   They were highly praised by their teacher.   I am used to the life style.   Important---importance   Lively   In case   I will take the umbrella in case it rains.   In the case---in this case---in that case   In that case , I had nothing to say.   Derivation   Adult   Apply for   I will apply for the visa to US.   Apply to   I won’t apply the method to you.   Application-----applicant   Application form   Classify----class   First class----economy class---grade   Convenience----inconvenient---inconvenience   Is it convenient for you to meet me at 4 tomorrow afternoon?   Avoid doing   I must avoid meeting you again.   Misunderstand---mislead---mistake.   present---absent   Generally speaking,   A puma at large   Appear   owing to ----because of

1 pebble   

n.卵石，小圆石

参考例句：

• The bird mistook the pebble for egg and tried to hatch it.这只鸟错把卵石当蛋，想去孵它。
• The pebble made a ripple on the surface of the lake.石子在湖面上激起一个涟漪。

2 pebbles   

[复数]鹅卵石； 沙砾； 卵石，小圆石( pebble的名词复数 )

参考例句：

• The pebbles of the drive crunched under his feet. 汽车道上的小石子在他脚底下喀嚓作响。
• Line the pots with pebbles to ensure good drainage. 在罐子里铺一层鹅卵石，以确保排水良好。