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1. Themolecular sieve is used to separate moleculesof different sizes.
分子筛用于分离不同大小的分子。
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2. The molecular sieve was developedto improve the efficiency of gas separation.
分子筛的开发是为了提高气体分离的效率。
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3. Themolecular sieve is a crucial tool inthe study of chemical reactions.
分子筛是研究化学反应的关键工具。