association，contact，associate with，be in contact with，affiliate with ；

[例句] 他们交往大概有一年了。 They were knocking around together for about a year.

[例句] 因为不怎么懂意大利语，她很少和人交往。 Since she knows little Italian, she keeps to herself.

exchange，house，bourse，[电影]Trading Places；

be at war，fight，wage war，engagement，a passage of arms ；

crossover，overlapping，blend，cross under ；

[例句] 悲剧开始相互交叠。 The tragedies begin to interlock.

[例句] 鱼鳞一片片上下交叠。 A fish's scales overlap each other.

[生] rotation cross，backcross ；

[例句] 也可用雌性F1与隐性纯合雄性亲本回交. F 1 females could be backcrossed to the male homozygous recessive parent.

[例句] 该方法可以很方便地应用于实际的回交育种. The method can be conveniently applied to practical backcross breeding programs.

social intercourse，social contact，gam，sociality ；

[例句] 她记起来那晚她正要去社交俱乐部。 She remembered that she was going to the social club that evening.

[例句] 在社交场合讨论生意被认为是不礼貌的。 It was thought bad form to discuss business on social occasions.

（结束友谊） break off a friendship，sever diplomatic relations，break off diplomatic relations ；

[例句] 断交3年后, 两国又重建外交关系. Three years after severing diplomatic relations, the two countries re - established their ties.

[例句] 两人多年前就已断交了. The two friends fell out years ago.

friendship，friendly relation，fellowship ；

[例句] 这位报界大亨和英国的显贵达人们交情甚好。 The press mogul befriended the high and mighty in Britain.

[例句] 萨拉和埃拉已经有7年的交情了。 Sarah and Ella have been friends for seven years.

turn over，transfer，deliver into sb.'s custody，hand over one's job to a successor，devolve on ；

[例句] 该案件将移交上诉法院审理。 The case is being referred to the Court of Appeal.

[例句] 预计他会被移交利物浦高等刑事法庭。 He is expected to be committed for trial at Liverpool Crown Court.

submit (a problem, etc.) to，refer to，put in，refer，referring ；

[例句] 所有提交的文件必须真实且易于查证，这一点很关键。 It is crucial that all documents presented are authentic and easily verifiable.

[例句] 申请人需要提交一份简历和附函。 Applicants are asked to send in a CV and a covering letter.

make friends with，associate with，association，consort，consort together ；

[例句] 他为人文雅，结交广泛。 He is a cultured man with a wide circle of friends.

[例句] 这些会议是一种相互结交的途径。 The meetings were a way to get acquainted with each other.

coupling，mating，pairing，coition，copulate ；

[例句] 这种雄鸟在与雌鸟交尾以前要跳一种交欢舞. The male bird performs a sort of mating dance before copulating with the female.

[例句] 雌螳螂在与雄螳螂交尾后,经常吃掉对方. The female praying mantis often eats the male after they mate.

futunio，aphrodisia ；

[例句] 平行线在远处看上去似交合在一起. The parallels seem to come together in the distance.

[例句] 两只小狗躲在树后交合. Two pups were having intercourse behind a tree.

cross point，cross-over point，intersection point，point of crossing，crossing ；

[例句] 在两条道路的交叉点发生了一起事故. An accident happened at the meeting of two roads.

[例句] 每个交叉点上的一条边的长度和方位角是一开始就决定的. The length and azimuth of one side at each junction point is first decided on.

cross swords，engage in a battle ；

[例句] 双方将在12月16日再次交锋以争夺进入四分之一决赛的席位。 The sides must battle again for a quarter-final place on December 16.

[例句] 候选人在电视辩论中当面交锋。 The candidates confronted each other during a televised debate.

talk with each other，converse，chat，have a conversation，colloquize ；

[例句] 我们认为他非常和蔼可亲，容易交谈。 We found him very approachable and easy to talk with.

[例句] 钢琴的弹奏声混杂着低低的交谈声。 The piano music mixes with the murmur of conversation.

hand over，present，submit，deliver ；

[例句] 今天早晨，刘易斯面色憔悴、疲惫不堪地递交了辞呈。 This morning, looking harassed and drawn, Lewis tendered his resignation.

[例句] 英国驻黎巴嫩的新任大使已将国书递交给总统。 Britain's new ambassador to Lebanon has presented his credentials to the President.

bosom [intimate] friend ；

[例句] 这对夫妇大约两年前相遇，很快就成了知交。 The couple met about two years ago and soon became firm friends.

[例句] 她不知交了什么好运, 赢了一大笔钱. By some freak of fate, she won an enormous sum of money.

negotiate，make representations，take up with，bargaining，negotiation ；

[例句] 显然是要讲和,交涉办不好. Obviously her attempt at conciliation had failed.

[例句] 我们的交涉已有很大的进展. We have made a great step forward in our negotiations.

blend，mingle ；

[例句] 他的生活与大自然亲密交融. He lived in close communion with nature.

[例句] 彩虹的不同色彩交融调和. The colors of the rainbow blend into one another.