having been prepared for a particular job or activity, by learning skills, getting qualifications, etc.

I didn't realize Emilio was a trained nurse. 我没想到埃米利欧是个受过专门训练的护士。

Are you trained in the use of this equipment? 你是否受过如何使用这个设备的培训？

humorous "Did I hear you say your children cleaned up after the party?" "Oh yes, I have them well-trained!" “你是不是说聚会后你的孩子收拾了屋子？”“是呀，我已经让他们变得训练有素了！”