dummy run

noun

1. 演习；试演
   a practice attack, performance, etc. before the real one

1. N-COUNT 试演;预演;演习
   A dummy run is a trial or test procedure which is carried out in order to see if a plan or process works properly.
   1. Before we started we did a dummy run.
      我们开始之前进行了一次演习。

1. Before we started we did a dummy run.
   我们开始之前进行了一次演习。
2. Dummy, you've run out of food in this scene.
   这场戏说你没有米了。
3. 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。
4. Dummy net environment must be built if users wanted to run it on PC.
   如果在PC机上运行就需要建立虚拟网络环境。