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- I can't say for certain when he will arrive. 我说不准他什么时候会来。
- I can't say for certain what to do. 我说不准该做什么。
- I think he lives there but I couldn't say for sure. 我想他是住在那里的,但我不敢肯定。
- She won't dare do that again, and that's for sure. 她不敢再干那事了,那是毫无疑问的。
- I couldn't say for certain when he'll arrive. 我说不准他什麽时候到。
- No one knows for sure what happened to Bill. 没有人确切知道比尔出了什么事。
- No one knows for sure how people first learned to preserve food. 没有人确切地知道当初人们是如何学会保存食物的。
- For certain reasons I will be unable to attend the meeting. 因为某种原因,我不能出席这次会议。
- I can not say for certain what to do. 我说不准该做什么。
- I can't say for certain off-hand. 我还不能马上说定。
- The shells she sells are sea-shells, for sure. 那我相信她卖的是海滩上的贝壳。
- Do you know for certain what will happen to him ? 你肯定他会碰到什么事吗?
- You can't say for sure that it won't rain tomorrow. 明天难保不下雨。
- We never knew for certain how it happened. 究竟是怎么发生的,我们始终未搞清楚。
- Nobody knows for sure what has happened. 没有人知道究竟发生了什么。
- Nobody knows for certain what kind of man he is -- he's rather a lone wolf. 谁也不知道他是什么样的一个人--他总爱独来独往。
- Do you know for sure that they will win? 你肯定他们会赢吗?
- Look at that sky! It's going to rain for certain. 瞧那天空!肯定要下雨了。
- She won't dare do that again,and that's for sure. 她不敢再干那事了,那是毫无疑问的。
- I can not say for certain when he will arrive. 我说不准他什么时候会来。