doer
['du:ə]
n.做某事的人, 行动家
例句与用法：
Great boaster, little doer.
夸夸其谈，不见行动。
It's better for the doer to undo what he has done.
解铃还需系铃人。
We need more doers and fewer organizers.
我们需要实干的人多些，组织的人少些。
He is a doer, not a talker.
他是一个实干家，不是一个空谈者。
详细释义：
n.
1. 行为者
2. 实干家