美国国会正在就8000亿美元的一揽子经济刺激法案中的一项条款进行激烈辩论。 该条款极其极端的要求在公共工程建设中必须使用美国生产的物资材料。

Congress is arguing about a clause in the $800 billion-plus stimulus package that in its most extreme form would press for the use of American materials in public works.

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极端的条件会培养出极其坚韧的植物。

Extreme conditions produce extremely tough plants.

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“这些极端寒冷的环境与地球外可能的栖息地极其相似。”她说。

'These extremely cold environments are the best analogues of possible extraterrestrial habitats,' she said.

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