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1. 瀵圭О╀瀵逛浣澶璐＄灏浣璐ㄩ涓蹇

2. ㄥ绉扮浣ㄧ╀涓跺ㄧ澹崇褰卞

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[1]Adrian Cho. How long would it take you to fall through Earth? Science, 2015; DOI: 10.1126/science.aab0366; http://news.sciencemag.org/earth/2015/03/how-long-would-it-take-you-fall-through-earth?rss=1

[2]Alexander R. Klotz. The gravity tunnel in a non-uniform Earth. Am. J. Phys. 83, 231 (2015); http://dx.doi.org/10.1119/1.4898780

Am. J. Phys. 83, 231 (2015)

[3]娆. 扮澶х.