1.
keep/hold/stand aloof from sb/sth :take no part in sth,show no friendship towards sb
不参与某事物,对某人无友好表示
2.
Men often oppose a thing, merely because they have had no agency in planning it.
人们反对某事，往往因为自已不曾参与某计划。
3.
compete for something; engage in a contest; measure oneself against others.
为某事而竞争；参与一场比赛；同……较量。
4.
To jabber(something)or engage in jabbering.
多嘴唧唧喳喳地闲谈（某事）或参与
5.
engage in an activity as if it were a game.
以一种游戏似的不认真的态度来参与某件事情。
6.
A person who is present at an event without participating in it.
旁观者处于某事件发生的现场但没有参与的人
7.
Make/enter into a contract with sb. for sth.
为某事与某人签订合同
8.
Confer with sb. on [about] sth.
与某人协商［商议］某事
9.
continue to support or retain one's connection with sb/sth
继续支持某人[某事物];保持与某人[某事物]的联系
10.
keep a distance(from sb/sth); not interfere(with sb/sth)
（与某人[某事物]）保持距离;不打扰（某人[某事物]）
11.
associate sb(with sb/sth);relate sb(to sb/sth)
使某人（与某人[某事物]）有联系;使有关系
12.
Go halves with sb. in sth.
合伙（做某事）；分摊，与（某人）平分（某物）
13.
attune sth/sb to sth ;bring sth/sb into harmony or agreement with sth;make sth/sb familiar with sth
使某事物[某人]与另一事物调合或一致;使某事物[某人]熟悉另一事物
14.
A condition or fact attending an event and having some bearing on it; a determining or modifying factor.
境遇参与事件并与其有某种联系的条件或事实；决定因素或影响因素
15.
have some connection with or responsibility for sth
与某事有牵连或对某事负有责任
16.
give a person an inkling that he has failed
向某人暗示他已失败(的事)(参看2a)
17.
A main participant in a situation.
首要参与者某一形势中的主要参加者
18.
One that participates, shares, or takes part in something.
参与者参与、分享或参加事物的人