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关注：1
2013-05-23 12:21
求翻译：The mixture was left to stand for 30 min at room temperature, and the absorbance of the resulting solution was determined at 517 nm.是什么意思？ 待解决
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- 离问题结束还有
The mixture was left to stand for 30 min at room temperature, and the absorbance of the resulting solution was determined at 517 nm.
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