| 单词 | 一旦 |
| 释义 | 一旦1. once一旦 yị̄dàn1) n. in a single day; in very short time2) conj. once; some time or other; whenever一旦我病了，你来主持这个项目。 Whenever I'm ill, you'll be in charge of this project.一旦yīdànin case (sth happens)ifonce (sth happens, then...)whenin a short timein one day一旦一天one day毁于一旦 be destroyed in a day忽然suddenly相处三年，一旦别离，怎么能不惋惜？ After three years together, if you suddenly had to part, would you not be sad?如果if一旦有可能 if possible一旦时机成熟 if the opportunity presents itself一旦实现 if it happens一旦有事，大家会帮助你的。 If you have a problem, everyone will help you.一旦 yī dàn （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 （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. 林语堂林语堂★◀▶一旦 [yi2dan0], adv. & conj., once (s.t. should happen): 一旦死了 should s.o. die one day.一旦 (adv.)if, once;一旦[yī dàn]1.一天之间（形容时间短）in a single day; in a very short time：毁于一旦 be destroyed overnight 2.不确定的时间词，表示有一天 one day: (a)用于已然，表示‘忽然有一天’ [used for one day in the past] in one day：相处三年，一旦离别，怎么能不想念呢？After being together for three years, how can they not miss each other after parting? (b)用于未然，表示‘要是有一天’ [used for one day in the future] some day; once：理论一旦为群众所掌握，就会产生巨大的物质力量。Once grasped by the masses, theory will generate a tremendous material force.一旦ad.once[用于条件句、否定句等]一旦conj.once一旦…(就…)；一…(就…)一旦1. once; as soon as一旦1. in a single day; in a very short time2. once; in case; now that♦ 他们多年相处, ~分别, 不免依依不舍。 After being together for years, they can't bear to part from each other. |
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