Water displacement curve is the most common method for water cut rule study, productive index prediction and recoverable reserve calibration. There are more than 50 methods of such a kind nowadays.
驱替特征曲线法是研究油田含水规律、预测开采指标和标定可采储量最常用的方法，目前已形成50多种。
The significance of ditching ratio per ten thousand ton ores for open pits is given, and how to use this index to test productive capacity of stope is briefly discussed.
对露天矿万吨矿石开沟比的含义，及如何利用这一指标对采场生产能力进行检验，作了简要的论述。
Reproductive trait of pig is an important economic trait, which is a crucial index to reflect the productive level and economy efficacy of hogpen.
猪的繁殖性状是一个重要的经济性状，是反映猪场水平和经济效应的重要指标。
Reproductive trait of pig is an important economic trait, which is a crucial index to reflect the productive level and economy efficacy of hogpen.
猪的繁殖性状是一个重要的经济性状，是反映猪场水平和经济效应的重要指标。
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