单词：not once
一次也没有
not once的用法和样例：
例句
用作副词(adv.)
- After this outburst the prince did not once allude to the subject again.在这次发怒之后，公爵一次也不再提这件事了。
- Doing it once was just about excusable - doing it twice was certainly not.这种事干一次也可以原谅，干两次就绝对不能了。