opening act

• 序幕

opening act的用法和样例：

例句

1. It's time to ring up the curtain on the opening scene.
   该鸣铃开始演出序幕了。
2. Is the opening prologue, after the process is, the conclusion is closed.
   开盘是序幕，盘中是过程，收盘才是定论。