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er own life.The local government developed its economy but at the cost of environment. → at any cost 在任何情況下,無(wú)論如何 . He is determined to win at any cost.at all cost / costs 不惜任何代價(jià) . We must prevent him from investigating this case at all costs.at cost 按成本,按成本價(jià)計(jì)算 . goods sold at cost15. catch sb. off (one’s) guard 趁某人不備, 使人喪失警惕. Caught off guard, the enemy were defeated by our sudden attack.The lawyer’s question caught the witness off (his) guard. 16. instruct v. 1) 指示,命令,吩咐 . The letter instructed him to report to the headquarter immediately. He instructed that a wall be built around the city.2)教授,傳授 ~ sb. in/ on sth. . Tom instructs us in sign language.3) 告知,通知 . The professor instructed us that we had one month to conduct the project. → instruction n. 指示,命令 17. render v. 使成為,使變成,使處于某狀態(tài)=make. The wide use of telephone has almost rendered telegraph useless. Hundreds of people were rendered homeless by the earthquake. He was rendered unconscious by a blow on the back of the neck.18. bring to a halt 使停止. The traffic in this street has been brought to a halt by a severe accident. Our plan was brought to a halt by his sudden illness. → bring to an end / a close / conclusion 使結(jié)束 . He brought the meeting to an end by giving a brief summary. The Red Army brought its winter attack to a successful conclusion.19. offensive n. 進(jìn)攻. They launched another offensive three months later.a. 進(jìn)攻的,冒犯的,得罪人的,令人不快的. It’s urgent to take offensive action now. Some jokes may be offensive to foreign people. Many ladies found the words printed on the box offensive. An offensive smell made me sick. → offend v. 1) 得罪,冒犯 . They’ll be offended if you don’t go to their wedding. (生氣) He didn’t mean to offend anybody with his joke. 2)犯罪,犯法 . He started offending at the age of 16.offender n. 犯罪者,違法者,罪犯offence n. 冒犯,違法行為20. thanks to 幸虧,由于,因?yàn)? Thanks to his financial support, we were able to continue our research.Thanks to their tireless efforts, the performance was a great success. 有時(shí)可用于反語(yǔ):Everyone knows about it now, thanks to you! → due to, owing to, because of21. reckon v.1) 想,認(rèn)為 . I reckon that I’m going to get that job. Many people reckon him to be a great basketball player.2)(be reckoned) 被普遍認(rèn)為是,被看作是 . Children are reckoned more sophisticated nowadays.3)估計(jì),估算 (常用被動(dòng)) . The age of the earth is reckoned at about 4,600 million yea