万涛空间设计
onceadv.一次曾经; 从前一旦; 一度[用于否定句]一次也(不); 完全(不)乘以一; (亲属间行辈上)小一辈; (程度上)相差无几once a year一年一次a once powerful nation曾很强盛的国家a cousin once removed堂[表]兄弟[姊妹]的孩子If the facts once become known, he will be punished.事实一旦公开, 他就要受到惩罚。I couldn't once understand what he meant.我完全不懂他的意思。Once one is one.一一得一。onceconj.一旦, 每当Once you begin you must continue.你一旦开始, 便不可停下来。n.一次, 一回Once is enough for me.对我来说一次就够了。adj.从前的a once friend从前的一个朋友all at once突然; 同时at once立刻, 马上; 同时
