A Lesson in a Lab
知識(shí)詳解
① expand vi. 膨脹 vt. 擴(kuò)大，擴(kuò)充
(回歸課本p41)when you heat a metal，it expands.
當(dāng)你加熱金屬時(shí)，它就會(huì)膨脹。
【歸納總結(jié)】
expand sth.使……膨脹，擴(kuò)大
expand on/upon sth.詳述，充分?jǐn)⑹鳋?br>expansion n.擴(kuò)張，膨脹
① metals expand when they are heated.
金屬受熱會(huì)膨脹。
②as children grow older they expand their interests and become more confident.
隨著兒童的成長(zhǎng)，他們的興趣會(huì)變廣，人也會(huì)變得更自信。
③could you expand on that point，please?
請(qǐng)你把那一點(diǎn)詳細(xì)說(shuō)明一下，好嗎？
【例句探源】
expand，extend，spread, stretch
(1)expand展開(kāi)，擴(kuò)大，不僅指尺寸的增加，還可指范圍和體積的擴(kuò)大。
(2)extend伸出，延伸，指空間范圍的擴(kuò)大，以及長(zhǎng)度、寬度的朝外延伸，也可指時(shí)間的延長(zhǎng)。
(3)spread伸開(kāi)，傳播，一般指向四面八方擴(kuò)大傳播的范圍，如傳播(疾病)，散布(信息等)。
(4)stretch伸展，拉長(zhǎng)，一般指由曲變直、由短變長(zhǎng)的伸展，不是加長(zhǎng)。stretch out 躺下，伸展。
【易混辨析】
①water expands when it freezes.
②the hot weather extended to october.
③the fire soon spread to the nearby buildings.
④the cat_stretched out in front of the fire.
1.why not try to________your story into a novel?
a.revise b.summarise
c.organise d.expand
解析：選d。句意是：你為什么不把你的故事擴(kuò)展成一部小說(shuō)呢？此句要用expand...into...表示“把……擴(kuò)展成……”。revise 的意思是“溫習(xí)”；summarise總結(jié)；organise組織起來(lái)；expand擴(kuò)展。
【即境活用】
★2.having finished his homework，tony stood up behind the desk，________himself.
a.expanding b.extending
c.stretching d.spreading
解析：選c。句意是：完成作業(yè)后，托尼從寫(xiě)字桌后站了起來(lái)，伸了伸懶腰。此題要用stretch指身體的伸展。
② conclusion n. 結(jié)論
conclusion
(回歸課本p45)iron rusts in ordinary water.
結(jié)論：鐵在普通水中生銹。
draw/come to/arrive at/reach a conclusion得出結(jié)論?jù)黰ake a conclusion下結(jié)論?jù)?br>bring...to a conclusion使……結(jié)束
in conclusion最后，作為結(jié)論地；總之
conclude v.得出結(jié)論；斷定，推斷出；結(jié)束
to conclude最后
conclude from sth.that從……中斷定
【歸納總結(jié)】
①they came to the conclusion that it’s time chinese football should be regulated.
他們得出的結(jié)論是：中國(guó)足球到了該整頓的時(shí)候了。
② in conclusion，i would like to say how much i have enjoyed myself today.
最后，我想說(shuō)我今天過(guò)得很開(kāi)心。
③it was concluded that the level of necessary change would be low.
據(jù)認(rèn)定必要的變化水平將會(huì)很低。
④i concluded from what they said that they wanted to accept the offer.
我從他們的話中推斷出他們想接受這份幫助。
【例句探源】
3.after a long discussion about the advantages and disadvantages of the plan，they finally came to a(n)________that it was practical.