uncertain about 对…不能肯定
- I own to being uncertain about that.
我坦白承认对那件事还没有把握。 - What I was uncertain about was whether they could do the work well.
我们不能确定的是他们是否能把工作做好。 - Scientists are also uncertain about how lightning propagates many kilometers through the air.
科学家也不确定闪电如何能在空中传送数公里。
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