starter

我们点了一份蔬菜汤作为开胃菜。

We ordered a vegetable soup as our ___starter.

起跑员挥动旗子示意比赛开始。

The ___starter waved the flag to indicate the race had begun.

发令员鸣枪，马拉松比赛开始了。

The ___starter fired the pistol to begin the marathon.