| 释义 |
一旦一旦[yī dàn]1.■ （一天之间） in a single day; in a very short time:毁于一旦be destroyed in one day;溃于一旦collapse overnight
常用词组1.■ （不确定的时间） once; in case; now that:一旦时机成熟Once the time is ripe...;一旦失去信心， 就甭想做好工作。If [When] one loses confidence, he can never expect to do his work well.一旦抓住了主要矛盾， 一切问题就迎刃而解。Once the principal contradiction is grasped, all problems will be readily solved. |