重點(diǎn)講解：
1. clean up 清理，清除（污染物）；
例句：We should clean up the dirty parts of the sea.
我們應(yīng)該清除海里的污染部分19o|@1o@g*7。
2. a clean bill of health 身體狀況良好；
例句：President Mitterrand, 75, has been given a clean bill of health by doctors in Paris.
巴黎的醫(yī)生們告訴75歲的密特朗總統(tǒng)，他的身體非常健康q&jE;q%Lr2w*Hxt.vT-。
3. take the lead 領(lǐng)先， 帶頭；
例句：They took the lead in conducting the experiments.
他們帶頭做試驗(yàn)0J4qwDI2rT~O&a;70r。
4. thanks to 幸虧；歸因于；
例句：Thanks to that job I became an avid reader.
多虧了那份工作我才成了一個(gè)喜歡閱讀的人ID|1~u(4j^&ieaXlo9。
5. benefit from 獲益；對…有益；有利于；
例句：A stammering child can benefit from speech therapy.
口吃的孩子可以從言語矯治中獲益m(C.C)2Y*&-+p_-si1RN。
6. be attributable to 可歸因于…的，可歸結(jié)于…的；
例句：10,000 deaths a year from chronic lung disease are attributable to smoking.
吸煙導(dǎo)致每年有1萬人死于慢性肺病K(NAK5)AP+CeGik9cMU9。
7. grapple with 努力解決（問題）；設(shè)法克服（困難）；
例句：The economy is just one of several critical problems the country is grappling with.
經(jīng)濟(jì)問題只是該國正竭力解決的幾個(gè)關(guān)鍵問題之一)|1hyl6&=iGZA。
8. lag behind 落后；趕不上；
例句：The restructuring of the pattern of consumption in Britain also lagged behind.
在消費(fèi)結(jié)構(gòu)重組方面，英國也落后于人Q3@HmLnbKk9bZE。