...限制函数模板参数为右值，你可以联合SFINAE(Substitution Failure Is Not an Error，匹配失败不是错误)和类型萃取（type traits）：
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简述了国内外铜萃取剂的类型，对不同类型萃取剂的性能、结构及使用进行了综述。
Types of copper extractants at home and abroad are introduced in this paper. Then the performance, structure and use for different copper extractant are also summarized.
讨论了不同类型反胶团体系的萃取机理。
The extraction mechanisms with different types of reverse micelles system were discussed.
捐赠的细胞来自于患者的兄弟姐妹，研究者从其中萃取极为特殊的CD 34血干细胞并移植到患者身上，该干细胞可以长成所有类型的血细胞。
The donated cells came from siblings, and the researchers extracted and transplanted very specific CD34 blood stem cells, which grow into all blood types.
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