Ø invest in 投资
　　 The state has planned to invest two millions in the dam. 国家计划投资两百万元修建这个大坝。
　　 Ø by itself (=alone, without help)单独地,靠自己
　　 The house stands by itself outside the village.
　　 这幢房子孤单地坐落在村外。
　　 Ø in itself在本质上,完全地;
　　 The baby is too young to feed itself.
　　 这婴儿太小了，不能自己吃东西。
　　 Ø of itself自然而然地
　　 In many cases the disease will clear up of its own accord.
　　 Ø be jealous of 妒忌
　　 He is jealous of their success. 他妒忌他们的成就。
　　 Ø jump at (=to be eager to accept) 向…扑去
　　 Members of the public would jump at the chance to become part owners of the corporation.
　　 Ø jump on (=scold, tell of, rebuke) 叱责
　　 When she broke the dish her father really jumped on her.
　　 她打碎盘子时，她父亲很生气地痛斥了她一顿。
　　 Ø junior to sb 年纪较…轻, 职位较…低
　　 She is junior to me. 她比我年纪小。
　　 Ø (be) keen on 喜爱, 渴望
　　 My roommates are very keen on bridge cards among other things. "我同房间的人,除了其他活动外,还喜欢玩桥牌。"
　　 Ø keep a close watch on ( =keep a sharp lookout for) 密切注视
　　 US officials have been keeping close watch on the situation.
　　 Ø To the best of my knowledge 就我所知
　　 ＝as far as I know，
　　 To the best of my knowledge, Barrie and Bonnie are twins.
　　 Ø at large(=at liberty, free) 在逃, 逍遥法外
　　 at large(=in general) 一般来说, 大体上
　　 at large(=at full length; with details)详细地
　　 The convict is still at large. 罪犯仍未归案。
　　 the country at large. 整个国家
　　 spoke at large about the court ruling.
　　 就法庭裁决做了长时间的发言
　　 Ø lean against (背)靠着…
　　 leaning against the railing. 倚在栏杆上参见
　　 Ø at least 至少; at most 至多
　　 waited at least an hour. 至少等了一小时
　　 Ø (not) in the least 一点(也不), 丝毫(也不)
　　 ＝ (not) at all
　　 I don’t mind in the least. 我根本就不在意
　　 Ø at one’s leisure 在…有空的时候
　　 I’ll return the call at my leisure.我有空就会来拜访
　　 Ø at length 1.(=after a long time, at last)终于 2. (=in detail, thoroughly)详细地
　　 At length we arrived at our destination.
　　 我们终于到达了目的地
　　 spoke at length about the court ruling.
　　 就法庭裁决做了长时间的发言
　　 Ø be liable to (=be subject to)易于的,应受(罚)
　　 be liable for 对…应负责任的
　　 In a depression banks are liable to fail.
　　 在经济萧条期间，银行很可能倒闭
　　 All adults in this country are liable for military service.
　　 Ø lie in 在于
　　 The solution lies in research. 答案在研究中
　　 Ø in life 人生中
　　 The intellect is not the most important thing in life.
　　 Ø for life (Till the end of one’s life.) 终身
　　 For life means for the rest of a person’s life.
　　 He was jailed for life in 1966 for the murder of three policemen.