ation的音标：ation的英式发音音标为：[eɪʃən]ation的美式发音音标为：[eɪʃən]...

In this age of thermonulear technolgy, neither view can assure man's preserv ation.在当今的热核技术时代, 这两种观点都不是以保障人类的生存.The term null hypothesis arose from earlier agricultural and medical applic ation of statistics.无效假设这个概...

增强辐射，文明阶段...