一笔5万美元的赏金用以悬赏阿尔瓦雷斯博士的人头。

A bounty of $50,000 was put on Dr. Alvarez's head.

《柯林斯英汉双解大词典》

并不是每个人都经历着阿尔瓦雷斯所描述的那种严重的慢性压力。

Not everyone experiences the kinds of severe chronic stresses Alvarez describes.

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这一铱异常为阿尔瓦雷斯假说提供了强有力的支持，尽管小行星本身从未被发现。

This iridium anomaly offers strong support for the Alvarez hypothesis even though no asteroid itself has ever been discovered.

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