acting in的用法和樣例：
例句
- The court is acting in loco parent.
正以家長地位行為的法院。 - He is acting in a fiduciary capacity.
他以受託人身份行為。 - Mr.Black wrote up their acting in the play.
布萊克先生寫文章，讚揚他們在這個劇中的演技。 - 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兩個力，平衡作用但反向，能導致旋轉但不能造成平移
