one-shot
/ˈwʌnʃɒt/adjective
1- informal, chiefly N. Amer. achieved with a single attempt or action〈非正式, 主北美〉一举成功的; 一蹴而就的：
there is no one-shot solution to the problem.
不可能一蹴而就地解决这个问题。
1.1
- done, produced, or occurring only once只做一次的; 只产一次的; 只发生一次的：
a one-shot deal.
一锤子买卖。