单词：rubidium-strontium
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词型变化：名词复数形式 : rubidium-strontiums
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China has launched two satellites into space on a Long March carrier rocket from the Xichang Satellite Launch Center in Sichuan Province. The satellites are part of the country's growing BeiDou Navigation Satellite System. The launch of the Long Marc
发表于:2019-01-19 / 阅读(229) / 评论(0)
2018CRI中国国际广播电台
2018CRI中国国际广播电台
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
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万物简史
万物简史