The sampling frequency and the sample size can be adjusted according to the effectiveness of the segregation between the adjacent Grade A and B zones.
可根据B 级洁净区对相邻A 级洁净区的影响程度，调整采样频率和采样量。
The life property, the distribution and relationship of some organisms with the environment are discussed according to their size-frequency histograms and survivorship curves.
据一些种群的大小频率直方图和生存曲线讨论了部分生物的生存特征、空间分布及其与环境的关系。
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