[体] starting gun [pistol] ;
例句:
The two crews now tensely awaited the sound of gun.
两只赛艇的队员在紧张地等待着发令枪声。
No one told you when to run, you missed the starting gun.
竟没人告诉过你何时该开始起跑, 不知不觉你便错过了发令枪响.
The starting gun blasted and they were off.
发令枪响了,他们冲了出去。