To avoid these dangerous things happening, liquid lithium-ion batteries all adopt rigid metal shell such as steel and aluminum as out covering.
为此，液态锂离子电池都是采用刚性的金属外壳如钢壳、铝壳等作外包装。
Metal ion has effects on the surrounding molecules depends on its radius, the charge and the structure of electron shell.
金属离子对周围分子的作用主要取决于其半径、电荷和及电子层结构。
The second largest global oil giant and a Fortune 500 company, Shell is known for its stringent ion criteria when it comes to executive hiring.
作为全球第二大石油公司和财富500强企业，壳牌公司在挑选人才方面极为严格。
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