以下为句子列表:
英文: The perfectly designed square-wave insures the stableness and concentration of electric arc.
中文: 设计理想的方波电源,确保了电弧的稳定和集中。
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英文: The symmetric structure of oxalic acid molecule and two carboxylic group on both ends ensure the stableness of c=c double bond.
中文: 草酸分子属于对称结构,两端的羧基使两个碳原子稳定化。
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