单词：nonserially
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Soon after taking up his position, Davy began to bang out new elements one after anotherpotassium, sodium,magnesium, calcium, strontium, and aluminum or aluminium, depending on which branch of English you favor. 上任不久，戴维开始宣布发现一
发表于:2019-01-29 / 阅读(249) / 评论(0)
万物简史
万物简史
And it'll be a permanent presence 这将会是长程计划 where each mission adds more capability and eventually 每次登月任务都会增强我们在月球上的作业效能 we'll just have people living there. 最后会有人住在月球上 This
发表于:2019-02-27 / 阅读(283) / 评论(0)
神秘的月球
神秘的月球