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- I am not certain whether it is true or not. 我没有把握这是否如此。
- They were not certain whether to go or not. 他们不能确定该不该去。
- So when you are not certain whether to call the lady "Miss" or "Mrs" you may just call her Ms. 所以当你不能肯定应称她“小姐”还是“夫人”时，你就可以称她“女士”。
- So when you are not certain whether to call the lady "Miss" or "Mrs." you may just call her Ms. 所以当你不能肯定应称她“小姐”还是“夫人”时，你就可以称她“女士。”
- We were not certain whether it was first made in China, but when silk came into written history only the Chinese were producing it. 我们不能肯定丝绸是否最先在中国生产,但文字记载中最早出现丝绸时,只有中国在生产丝绸。
- I am not certain about the result. 我对结果没有把握。
- I am not certain I have grasped what you meant. Is it(that) you are not satisfy with your present job? 我不能肯定已经领会您的意思。是不是您不满意您现在的工作。
- Other server controls are not certain to be created and ready for access. 不一定会创建其他服务器控件,也不一定能够访问它们。
- The old tree answered, as if he was not certain himself. 老树回答道,好像他没确定自己的观点似的。
- Scientists are not certain why the oxygen level dropped. 科学家们现在还不能断定为什么含氧量会下降。
- Don't commit your promises to paper if you are not certain you keep them. 如果你没有把握兑现你的许诺，你就不要做出书面保证。
- He was not certain that he would use the razor blade even if he got the chance. 他即使有机会，他也没有把握会不会用刀片。
- At present we are not certain about the exact number of minority nationalities in the southwest. 西南的少数民族究竟有多少，现在还不清楚。
- There are many things in the world which are accepted as certain when they are not certain . 世界上有许多东西被认为是理所当然的，而它们却并非如此。
- I am not certain I have grasped what you meant. Is it that you are not satisfied with your present job ? 我不能肯定已经领会您的意思。是不是您不满意您现在的工作。
- Of course this is only a personal view,and I am not certain my peers will accept it. 这当然还是一家之见，至于能否让同仁们接受，还不敢肯定。
- Be not a visit to Mr. George obligatory? 是不是必须我拜访乔治先生？
- I'm not certain I've grasped what you meant. Is it(that) you are not satisfied with your present job? 我不能肯定已经领会您的意思。是不是您不满意您现在的工作?
- This high- pitched babble is presumably for courtship, although scientists are not certain. 据推测，这可能是雄性老鼠在求爱，尽管科学家对这一点还不是很确定。
- Et may be not a bad idea to rent a camera. 租一架照相机倒也不坏。
