打完子弹英语怎么说

"打完子弹"的英文表达是 "shoot one's wad"。

这个短语源自古时火药枪，在发射子弹前需要先将火药装入弹药筒，而当弹药用完时，就意味着火药也被"打完"了。因此，这个短语被用来比喻在某些场合中用尽了所有的力量或资源。

例句：

He's already shot his wad by spending all his money on a new car. 他已经把钱都花完了，买了一辆新车。
After the big presentation, I felt like I had shot my wad and had nothing left to give. 在大型演讲后，我感觉已经尽力了，没有任何东西可以再给了。