1. We knew nothing to the contrary.
   当时我们不知道任何相反的情况。
2. I know nothing about accounting.
   我对会计学一窍不通。
3. I know nothing about Latin grammar.
   我一点都不懂拉丁语法。
4. I know nothing about first aid.
   我对急救一无所知
5. They know nothing about exothermic chemical reactions.
   他们封放热的化学反应一无所知。

　1个名词解释