A plot device can be anything which moves the plot forward or maintains it. Many examples of plot devices follow.
双语例句
1
Mistaken identity (or the loss of one) was a common plotdevice 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。
2
But physicists know that time travel is more than just a compelling plotdevice - 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。
3
Screenwriters often employ a plotdevice called a reversal, in which a hero who seems to be making progress abruptly finds himself worse off, and facing a much greater menace.