聚类分析方法是土壤研究中的一种合理有效的新方法。
Clustering analysis is a new, reasonable and effective method in soil study.
他们对土壤进行了化学分析。
采用频谱分析方法研究了鼠道犁土壤工作部件的随机受力。
The random forces on the mole plough were studied by the spectral analysis method.
采用频谱分析方法研究了鼠道犁土壤工作部件的随机受力。
The random forces on the mole plough were studied by the spectral analysis method.
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