Mistaken identity (or the loss of one) was a common plot device in the English director's films, too.

误区身份证(或损失之一)是一个共同的阴谋装置在英文导演的电影，太。

But physicists know that time travel is more than just a compelling plot device - it's a serious prediction of Einstein's general relativity equations.

但是，物理学家知道，时间旅行不只是令人信服的秘密装置，而是爱因斯坦广义相对论方程的严肃预言。

Screenwriters often employ a plot device called a reversal, in which a hero who seems to be making progress abruptly finds himself worse off, and facing a much greater menace.

编剧们都喜欢设计情节反转的桥段，英雄看起来正在取得一些进展，突然发现自己陷入更大的困境中。