- mass noun the fact or process of doing something, typically to achieve an aim（尤指为达成一目的）行动, 行动过程：
demanding tougher action against terrorism
要求采取更强硬的行动反对恐怖主义
if there is a breach of regulations, we will take action.
要是有违反规章的情况, 我们就会采取行动。
- the way in which something such as a chemical has an effect or influence（化学物等起的）作用：
the seeds require the catalytic action of water to release heat.
种子需要水的催化作用来散热。
- short for INDUSTRIAL ACTION.INDUSTRIAL ACTION的简称：
the rank and file want to call the action off.
基层群众想取消这次罢工。
- armed conflict武装冲突：
servicemen listed as missing in action during the war.
战时在战斗中失踪人员名单上的军人。
- count noun a military engagement战斗, 作战, 军事行动：
a rearguard action.
后卫战斗。
- the events represented in a story or play情节：
the action is set in a country house.
故事发生在一所乡村房舍里。
- informal exciting or notable activity〈非正式〉（令人激动的或值得注意的）活动：
the weekend sporting action begins on Saturday
周末的体育活动从周六开始
people in media want to be where the action is.
媒体人员想亲临活动现场。
- as exclamation used by a film director as a command to begin开始（电影导演开拍的指令）：
lights, camera, action.
灯光, 摄影, 开始。
- a thing done; an act事情, 行为：
I would not be responsible for my actions if I saw him.
我要是见到他, 就不会对我的行为负责。
- a legal process; a lawsuit诉讼：
a civil action for damages.
要求赔偿损失的民事诉讼。
- a gesture or movement举动, 行动。
- usu. with modifier a manner or style of doing something, typically the way in which a mechanism works or a person moves做事方式, 风格（尤指机械运转或人的动作方式）：
a high paddle action in canoeing.
划船时的一次高桨划动。
- the mechanism that makes a machine or instrument work（使机器或器械运转的）机制：
a piano with an escapement action.
有控键装置的钢琴。
- take action on; deal with对…采取行动, 处理：
your request will be actioned.
你的请求会被受理的。
actions speak louder than words
- proverb what someone actually does means more than what they say they will do〈谚〉事实胜于雄辩。
go into action
- start work or activity开始行动, 干起来。
in action
- engaged in a certain activity; in operation在活动, 在运转：
watching him in action, normal workers are left in awe.
看他工作, 普通工人都肃然起敬。
man （或woman） of action
- a person whose life is characterized by physical activity or deeds rather than by words or intellectual matters实干者。
out of action
- temporarily unable to engage in a certain activity; not working暂停活动, 不（再）起作用; 不（再）运转, 失效：
a heart attack put him out of action.
他心脏病发作, 无法继续工作。
put into action
- put into effect; carry out生效; 实施。