acting in的用法和样例：
例句
- The court is acting in loco parent.
正以家长地位行为的法院。 - He is acting in a fiduciary capacity.
他以受托人身份行为。 - Mr.Black wrote up their acting in the play.
布莱克先生写文章，赞扬他们在这个剧中的演技。 - A pair of forces of equal magnitude acting in parallel but opposite directions, capable of causing rotation but not translation.
力偶具有相等磁性的两个力，平衡作用但反向，能导致旋转但不能造成平移
