Enriched uranium is a key component of a nuclear weapon.

浓缩铀是核武器的一个关键组成部分。

《柯林斯英汉双解大词典》

It's also a key component in fuel cells.

它也是燃料电池的关键组成部分。

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Cost is a key component in developing Africa 's oil resources.

开发非洲石油资源，成本是个关键因素。

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And because the key component of solar cells is an expensive, highly purified form of silicon, there's a real economic benefit to this design.

VOA: standard.2010.02.19

Reducing wastage, for example by buying products with little packaging, is a key component of sustainability.

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The two stadium proposals in Southern California both lack a key component: an NFL team.

WSJ: St. Louis's Dome Dilemma

Energy is a key component in this onslaught of growth and desire to play catch up.

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