1. Phi Beta Kappa Kappa Beta Phi(ΚΒΦ) is asecret society, best known for itsWall Street...
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>> The Science Book Day1: Vocabulary 【图例注释】 [→] Day1笔记 [ △ ] Day2笔记 △ Science is an ong...
About article This article is a brief review of the history of science. It can be rough...
1. perpetual 永久的；反复不断的 <neu> …… the creation of a perpetual union 创立一个永久性公会 <neg> …… pe...