作“所做之事, 行为,情节”讲时是可数名词。
其它意思时一般为不可数的抽象名词。
如:
He was sorry for his actions.
他为自己的行为感到懊悔
具体的用法,意思见下:
n.
The time has come for action.
行动的时候到了。
He was sorry for his actions.
他为自己的行为感到懊悔。
The action is set in France.
事情发生在法国。
Photographs are produced by the action of light on film.
光对底片发生作用从而产生照片。