新的证据表明为什么充足的睡眠是头等大事。

New evidence shows why getting enough sleep is a top priority.

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什么是可以划分20世纪和21世纪的精神大事？

What were the events demarcating the spirit of the 21st century from that of the 20th?

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即时信息是件大事，但是它意味着什么呢？

This is big stuff, but what does it all mean?

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What are the ramifications of the proposed change. Will it break other things?

可能的变化有什么分支？,它们会不会导致其它错误？这是件大事？

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or if you're feeling like a big event has happened. Or if you're feeling that they look really great.

或者你觉得对方发生了什么大事，或者是你觉得他们看起来棒极了。

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