论文存在问题较多的是科研设计方法和样本含量。
The problems are the methods of scientific design and sample coverage.
目的探讨病例对照家系设计中样本含量的估算方法及影响因素。
Objective Discussing sample size estimation method and effect factors for case control family design.
土壤盐分含量为0.168%，80%的样本出现盐渍化现象；
Soil salt was(0.168)%, and 80% of the samples had secondary salinification.
土壤盐分含量为0.168%，80%的样本出现盐渍化现象；
Soil salt was(0.168)%, and 80% of the samples had secondary salinification.
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