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另一端为羟基和羧基，具有亲水性。
Another end for the hydroxyl and the carboxyl group, has the water affinity.
youdao
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在使用羧基治疗之后，皮肤变得光滑有弹性。
The skin becomes smooth and elastic after the treatment.
youdao
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在使用羧基治疗之后，皮肤变得光滑有弹性。
The skin becomes smooth and elastic after the treatment.
youdao