这封信是达尔文为感谢美国地质学家费迪南德·范德维耶·海登博士而写的。

The letter was written by Darwin to thank an American geologist, Dr. Ferdinand Vandeveer Hayden.

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但是看来伤口确实保持得更干净了，里维耶洛说，同时也减少了换绷带的需要，这对于病人而言是很痛的。

But it did seem to keep the wounds cleaner, says Riviello, and reduced the need to change bandages, which is painful for the patient.

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星期四在位于的黎波里西部的扎维耶市也爆发了冲突。

Another clash broke out Thursday just west of the capital in the city of Zawiya.

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