unit 4:1. concentrate vi. 聚精会神，集中思想，多与 on 和 upon 或连用 concentrate on your work. 集中精神工作。e.g. a driver should concentrate on the road when driving.industrial development is being concentrated in the west of the country. 2.  acquire vt. 获得, 学到，取得，拥有 acquired, acquiringe.g. she acquired a knowledge of the english by careful study.some smoking and alcoholic drinks are an acquired taste and are not in born. 3.  accuse sb. of doing sth. 指责，指控 accused, accusinge.g. the police accused him of murder. 警方指控他谋杀。she accused him lying. 她指责他说谎.he was wrongly accused of stealing. 他误遭控告犯偷盗罪. 4. be of interest/ importance, value, use, help, ... = interesting/important/valuable/useful/helpful...e.g. this is a matter of great importance. 这是一件非常重要的事。the book is of great value to me. 这本书对我来说有很大价值。there is nothing interesting/of interest in today's newspaper. 5. journalist  n.新闻记者；新闻工作者e.g. he is a professional journalist. 他是一位专门的新闻从业人员 6. delighted  a. 高兴的, 快乐的e.g. i am really delighted. 我真的很高兴。【词语联想】delight  n. 高兴, 愉快 ； vt. 使高兴, 乐于； vi. 感到高兴(或愉快、快乐)e.g.singing is her chief delight.  唱歌是她的主要爱好。 7. assist  n. 帮助, 协助； vt. 帮助, 促进； vi. 协助, 参加【习惯用语 】ø assist sb. with sth. 帮助某人[做某事]øassist sb. to do sth. 帮助某人[做某事]øassist sb. in doing sth. 帮助某人[做某事] ◆ 区别: help, aid, assist 都含"帮助"、"援助"的意思。øhelp 系常用词, 意义较aid, assist 强, 指"以积极态度给予各方面的帮助", 强调"受助者得到帮助或好处", 并着重"受助者对帮助的需要"e.g. please  help me arrange these papers. øaid 属较正式用语, 强调"帮助受助者脱离困难或危险", 有时意味着"强者援助弱者"e.g. they aided flood victims. øassist是正式用语, 多指"在提供帮助时, 帮助者起次要或起协助作用"e.g. she assisted him in his experiments.

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