采取行动的英文是take action。
虽然action既能作可数名词也可作不可数名词，但在take action词组中action 为不可数名词，所以该词组通常不说take actions。
双语例句：
我们采取行动以前需要有更多时间观察情况的发展。
We need more time to see how things develop before we take action.
我们必须立即采取行动。
We must take action at once.
他们未采取行动，这表示他们没有兴趣。
Their failure to act is indicative of their lack of interest.
我们得在全欧洲范围内采取行动。
We need to act on a Europe-wide scale.
由于火势蔓延，须要立即采取行动。
Prompt action was required as the fire spread.