People may not be sure about life on Mars until a sample of life is brought back.
人们可能不确定火星上是否有生命，直到一个生命样本被带了回来。
I'm not sure if my leg will be ready for the game.
我不确定我的腿能不能在比赛前恢复。
The man might be a doctor in this hospital, but I'm not sure.
那个人可能是这家医院的医生，但我不确定。
I'm not sure what I want to be but I'm sure that you have already known.
我不确定我想成为什么，但我相信你已经知道了。
I'm not sure what kind of engineer I want to be yet.
我还不确定自己想成为什么样的工程师。
No one knows what she might be doing now, but not washing up, that's for sure.
没人知道她现在在干什么，但肯定不是在洗餐具。
My idea would be to combine that with careful oversight, a strong organizational culture, and make sure the goals that you use are going to be constructive and not significantly harm the organization.
我的想法是，将这一点与仔细的监督、强大的组织文化结合起来，确保你使用的目标具有建设性，不会对组织造成重大损害。
Now I am not sure I will be qualified to graduate next semester.
现在我不确定我是否有资格在下学期毕业。
She had not known him long enough to be sure.
她认识他的时间还不够长，还不能肯定。
I'm not sure there might be additional things that international students have to do like additional tests.
我不确定国际学生是否需要做额外的事情，比如额外的考试。
I'm not sure I want to change rules, but I'd like the police to be stricter on the rules.
我不确定我是否想要改变规则，但我希望警察能够更严格地执行规则。
The idea "happiness", to be sure, will not sit still for easy definition.
可以肯定的是，“幸福”这个概念很难定义。
Even now we could not be sure that the militants would not find some new excuse to call a strike the following winter.
即使到现在，我们也不能确定这些激进分子不会找到某个新的借口在下一年冬天号召一场罢工。
One thing is for sure —it's not going to be easy.
有一点可以肯定—事情不会很容易。
I'm not sure I'll be any good but I'll have a bash.
我不敢保证我能有什么用，但我会试试。
Whether or not we're successful, we can be sure that we did our best.
不管成功与否，我们确已尽了最大努力。
Be sure not to take extra breaks or too long breaks as it can affect your plan.
确保不要有额外的休息或太长时间的休息，因为这会影响你的计划。
When they get to know me and to trust me, knowing for sure I'm not selling them something—there'll be more honest feedback from them.
当他们开始了解我、信任我，并确信我不是在卖什么东西给他们时，他们会给出更诚实的反馈。
It seems that pretty much everyone else in the class gets what they are supposed to be doing but I'm not so sure.
似乎班上几乎每个人都懂了他们应该做什么，但我却不那么确定。
One can never be sure that it is not on the point of breaking out into action.
人们永远无法确定它是否即将付诸行动。
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