... be serious about 对…是认真的;认真对待 be sure about 对…有把握;确信 be worried about 为…而担心,忧虑 ...
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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。
Be sure about the purpose of writing the feature story.
确定好写特写的目的。
That is scary, and we cannot be sure about changes in the future.
这是可怕的,因为我们无法确定未来会发生什么变化。
But Professor Bedau says that nobody can be sure about the results of making new forms of life.
VOA: special.2010.07.20
I'm not at all sure there's anything more to be said about that passage, which I think lays it to rest.
我不确定这篇文章是不是,还要更多的讲解,就这样的吧。
Weird things, bad things can happen and so one of the lessons too that will be repeated throughout the course is to actually rigorously error check and make sure that you're always thinking about your user being a bad guy.
各种古怪的事情就会蜂拥而至,所以在这个课程中我反复强调,要一丝不苟地检查错误,你就当你的用户是个调皮捣蛋的家伙。
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