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1·Sealed orders; a sealed move in chess .

密封命令；象棋中封棋的一着。

2·I was engaged, Sir, on what we call sealed orders, to sail this ship for that gentleman where he should bid me, said the captain. so far so good.

“先生，我是被我们称为密封的命令任命的，要将这艘船开到这位先生命令我开到的地方，”船长说，“到目前为止，一切顺利。”

3·My lips are sealed, Hillary Clinton said. I am under very strict orders not to talk about it.

希拉里克林顿说：“我不能多说。他们要求我严格保密。”