150.keep an aye on 留意，照看

　　Keep an eye on the child while I am out. 我出去時麻煩照看一下這孩子。

　　Please keep an eye on my flowers in my absence. 我不在時幫我照看一下花。

　　151.keep one's word 遵守諾言

　　He always keeps his word. 他總是遵守諾言。

　　We must keep our word even if we should lose by it . 即使守信吃虧，我們也必須遵守。

　　152.keep pace with 與……齊頭并進，與……并加齊驅(qū)

　　You must read the papers to keep pace with the times. 你必須閱讀報紙來跟上時代。

　　His mental development kept up with the growth of his body. 他的智力發(fā)展與他的體格并頭并進。

　　153.know about/of 聽說，了解 I know of him, but I've never met him. 我聽說過他，但從未見過他。

　　I didn't know about her father's death until last week. 直到上周我才得知她父親去世的消息。

　　154.laugh at 因……而笑，嘲笑

　　We laughed at that funny-looking dog. 我們看到那長得有趣的狗都笑了。

　　They all laughed at the joke. 他們聽了笑話后都笑了。

　　155.lead to 引起，導致

　　These words lead to misunderstanding. 這些話引起誤解。

　　All roads lead to Rome. 條條大路通羅馬。

　　156.learn from向……學習，從……學習

　　We learnt a lot from that teacher. 我們從那位老師那兒學到了許多。

　　We learn form life. 我們從生活中得到知識。

　　157.learn about/of 聽說，獲悉

　　I learnt of his death in the newspaper. 我從報上得知了的死訊。

　　His mother learned of her son's success from the newspaper. 他的母親從報紙上得知她兒子成功的消息。

　　158.leave for 動身到

　　He left for Shanghai yesterday. 他昨天動身去了上海。

　　He left for seeking new experience. 他去尋求新的經(jīng)歷去了。

　　159.lie in 在于

　　The secret of good golf lies in the wrist action. 高爾夫的秘訣在于腕部的動作。

　　Success lies in diligence. 成功在于勤奮。

　　160.little by little 逐漸

　　Little by little, he learnt to write Chinese characters. 漸漸地，他學會了寫漢字。

　　The infant crawled little by little. 這個嬰兒一點點地向前爬。

　　161.lvie on以……為生

　　He lives on pension. 他靠養(yǎng)老金為生。

　　It must be very hard to live on such a low salary. 靠這樣的低工資維持生計必定很艱難。

　　162.long for 渴望，極想

　　Children long for holidays. 孩子們都盼望著假期。

　　People all over the world long for peace. 全世界人民渴望和平。

　　163.look after 照顧，照看

　　Look after your own affairs and don't interfere in mine. 少管閑事。