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- I made slow time down the steps but once on the flat I was all right. 我慢慢地下着楼梯，但当我一踏上平地时，我就不要紧了。
- I have written but once since I came here. 自从我来到这儿以后，我只写过一回信。
- I never lived amongst fine people but once. 我只在时髦的人们中间生活过一个时期。
- But once again a reference is being passed. 但同样地，实际传递的是一个句柄。
- The wise man is deceived but once,the fool twice. 智者只上一次当，愚人可上二次当。
- Just my luck. But once I'm out of the fortress. 我真走运,不过一旦我从要塞里面逃出来。
- But once again I cannot rule out that possibility. 然而,我也不能完全排除这个可能性。
- But once you come in here, you can relax. 但一旦进来小中心,你们可以放轻松。
- I have written home but once since I came here. 我到这里以后只给家里写过一次信。
- A lie will serve your aim, but once. 谎言可以为你的目的服务,但只一次。
- Christmas comes but once a year. 圣诞一年只一度。
- Youth comes But once in a life time. 青春在人的一生中仅有一次。
- Youth comes but once in a lifetime. 青春一生只有一次。
- He looked but once, and vail'd eyes again. 他只看了一下,又垂下眼帘了。
- The valiant never tastes of death but once. 勇士舍生取义只经历一次死的痛苦。
- Christmas comes but once a gear. 圣诞节一年过一次；好日子不能天天过。
- The wise man is deceived but once, the fool twice. 智者只上一次当，愚人可上二次当。
- But once it happens, it is permanent. 但是，一旦发生，耳聋将会是永远的。
- I am shy, but once you get to know me, I'm a hoot! 我很害羞，但是一旦你了解我就知道，我很无赖的！
- But once he learns, he'll never forget. 但一旦他学会，就永远忘不掉了。
