not once

• adv. 一次也不

not once的用法和样例：

例句

用作副词 (adv.)

1. 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。
2. 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。