Illustrates the sampling of this research program, as well as data collection and analysis methods.
说明了本调查研究的抽样方案以及资料收集和分析方法。
What is the best method of soil sampling for research work?
我们的研究中，最佳的采样方法是什么？
The research on bulk sampling has great significance in our country.
散料抽样研究在我国有着重要的意义。
The research on bulk sampling has great significance in our country.
散料抽样研究在我国有着重要的意义。
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