Be due to a great variety and minute particle size and multivariate shape and great difference in particle's size, which brings difficulty to separation of pollens.

但由于花粉种类繁多、颗粒微小、不同种类花粉形状多变且大小相差很大，这给花粉的分选带来极大困难。

youdao

Suspension particle size distribution in produced water (PSD) can better represent the separation accuracy of treatment facility, and is of index significance.

出水中悬浮颗粒物的粒径分布(PSD)更能代表处理设施的分离精度，因而更具有指标性的意义。

youdao

As the particle size was increased, the optimum mixing and emptying time and remains were greatly decreased, and the separation degree of over-mixing was higher.

随着物料粒度的增大，最佳混合时间、卸料时间和留存量均明显减小，过度混合的分离现象也就越严重。

youdao