The main function of Linclion pump is to seal off the lubricator.

林肯泵主要作用是密封注油头。

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A device used on the outside of the casing of a well to seal off formations or to protect certain zones.

为封堵地层或保护某些层段在井内套管外面所用的装置。

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MicroRNAs could be used to seal off human cells from disease-causing viruses, or to disable viruses that gain entry.

小分子核糖核酸可以用来封闭人体细胞，使之免受致病病毒的侵扰，或者使病毒丧失侵入细胞的能力。

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Then there's encryption software to seal off your hard drive in case your computer goes for a walk.

FORBES: Magazine Article

Now the Germans are scrambling to seal off this hole in their fence before Murdoch's hordes pour through it.

FORBES: Magazine Article

Countries have already begun to seal off their markets against foreign products in an effort to protect domestic producers.

FORBES: Megamind:Who are the HEROES and the SUPER-VILLAINS of the Trade and Currency War?