他是个非常小心谨慎的人,在作出某项决定之前他总是先周密思考。
He is a very cautious man; he always thinks very carefully before he makes a decision.
这是一个非常大、非常有趣也是最根本的一项挑战,目前本研究还没有解决这个问题,要去周密思考这个问题非常令人兴奋。
That is a really big, interesting, fundamental challenge that research hasn't yet tackled, and that's exciting to contemplate.
回答这个问题使她不得不做周密的思考。
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