2020年8月18日
1117 Eddington Number (25分)
摘要： British astronomer Eddington liked to ride a bike. It is said that in order to show off his skill, he has even defined an "Eddington number", E -- tha 阅读全文
posted @ 2020-08-18 18:37 kalice 阅读(149) 评论(0) 推荐(0)