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关注：1
2013-05-23 12:21
求翻译：slightly elevated in new drainage ditches, then declined with time. Total P was not affected by drainage. Dis-solved oxygen averaged 5.1 mg L-', was unchanged initially by ditching, and increased to 6.9 mg L -~ in water draining older plantations.是什么意思？ 待解决
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- 离问题结束还有
slightly elevated in new drainage ditches, then declined with time. Total P was not affected by drainage. Dis-solved oxygen averaged 5.1 mg L-', was unchanged initially by ditching, and increased to 6.9 mg L -~ in water draining older plantations.
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