名詞 one-shot:

1. a charge of ammunition for a single shot
   同義詞：round, unit of ammunition, one shot

one-shot

adj.Informal （形容詞）【非正式用語】
Becoming effective after only one attempt:
一次完成的：要稍微努力就出效果的：
例句：
looked for a one-shot solution to the problem.
尋找最快捷的解題方法

Being the only one and unlikely to be repeated:
獨(dú)一無二的：
例句：
The funding was a one-shot deal.
這次投資是一筆無法比擬的賭注