acid test

名词 acid test:

1. a rigorous or crucial appraisal

1. Can Jones beat Smith? That's the acid test.
   琼斯能击败史密斯吗？那是个严峻的考验。
2. The acid test of a good driver is whether he remains calm in an emergency.
   衡量驾驶员水平的决定性考验，就是看他在紧急关头能否保持镇静。