One is to try to seal up any obvious cracks and crevices.

其一是密封任何显眼的缺口裂缝。

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You must seal up the envelope before mailing the letter.

你在寄信前必须先将信封密封。

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Some of the research we did studied earphones that completely seal up the ear canal.

经过我们研究，发现有的耳塞能完全密封住耳槽。

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Those children don't even know that this vote we have today is going to seal up their future.

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Let's say you decide to use this rebate to seal up and insulate your attic -- because you want to save electricity, but also because you're tired of a drafty house.

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And it turns out that if producers would actually seal up those leaks, not only would it be great for the environment, but they'd also make money because that's money going out of their pockets from all those leaks.

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