The government is more focused on preventing new debris from forming than taking the trash out of orbit.

政府更关注的是防止新的碎片形成，而不是把垃圾带离轨道。

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The insulating foam prevents ice from forming on the tank when it is filled with 500,000 gallons of supercold liquid hydrogen.

当容器内充满50万加仑的超冷液态氢时，绝缘泡沫可以防止冰在容器上形成。

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That discourages them from forming fibres.

这阻止它们形成纤维。

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For example, you can add sand to prevent tiny breaks or lines from forming in the finished product.

VOA: special.2009.09.14

PROFESSOR: No. So, compared to the atoms, it should be somewhat the same energy, we shouldn't get any extra stabilization from forming the molecule.

不会，所以和原子相比，它的能量相同，形成分子并不会带来额外的稳定性。

麻省理工公开课 - 化学原理课程节选

So, when we talk about memory, for instance, we'll talk about disorders in memory, including some disorders that keep you from forming new memories as well as disorders of amnesia where you forget the past.

比如说,当我们讨论记忆的时候,我们会讨论记忆障碍,包括了使你无法形成新鲜记忆的一些障碍,以及遗忘过去记忆的遗忘症障碍

耶鲁公开课 - 心理学导论课程节选

It also keeps new tumors from forming by preventing them from using existing estrogen as kindling.

FORBES: Old Breast Cancer Drug Brings in New Money

In fact, a market correction, though unpleasant, helps to prevent irrational exuberance from forming.

FORBES: Is The S&P 500 Cheap?

Said another way, attempts to prevent bubbles from forming will only make folks more complacent about bubbles.

FORBES: What If This Is As Good As It Gets: Financial Stability Edition