复数: dummy runs
noun
BrE演习;试演 a practice attack, performance, etc. before the real one
Before we started we did a dummy run.
我们开始之前进行了一次演习。
Before we started we did a dummy run .
The local elections can be seen as a dummy run for the national election next year .
地方选举可以被看成是明年全国大选的热身赛。
Dummy , you 've run out of food in this scene .
这场戏说你没有米了。