n. (Gassendi)人名;(法)伽桑狄

In the 17th century, the French scientist Pierre Gassendi knew that light traveled faster than sound. When a gun fired far away, he could see the flash of gunshot long before he heard the report. Gassendi tried to measure the speed of sound by clocki

发表于:2018-12-31 / 阅读(211) / 评论(0) 分类 英语听力文摘 English Digest
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