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补充一下: Instead of comparing the arrival times of seismic waves at different locations, as earlier researchers had done. Wadati relied on a time difference between the arrival of primary (P) waves and the slower secondary (S) waves.
可以表明,Wadati给出的实验是针对固定点的,也就是infer题中的given location.
其实我在看原文的时候也只是有个概念,知道应该是同一个点,但也没对题目中given这个词有很深的印象,多谢提问的同学.以后对阅读还是需要增强对这些字的敏感训练. |
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