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关注：1
2013-05-23 12:21
求翻译：Then 0.5 mL of the supernatant was withdrawn at a given time interval by using a 1 mL pipette and used for the residual metal analysis and the pH was measured.是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
Then 0.5 mL of the supernatant was withdrawn at a given time interval by using a 1 mL pipette and used for the residual metal analysis and the pH was measured.
问题补充：  
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