The factors such as rain time, precipitation form and topography should be considered when the samples are collected for chemical analysis.
在采集水样进行养分分析时，应考虑降水时间、降水形态和地形等因子的影响。
The factors such as rain time, precipitation form and topography should be considered when the samples are collected for chemical analysis.
在采集水样进行养分分析时，应考虑降水时间、降水形态和地形等因子的影响。
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