“分选”怎么读

因为沉积作用是快速的, 分选作用和层理就得不到很好的发展.Because deposition is rapid, sorting and stratification are generally not well developed.轻的籽粒可以通过空气动力,即气流分选机清理出来.Light kernels may be removed by a pneumatic or air seperator.砂粒在波浪分选作用下从粉砂及粘土中...

“分选”的英语可以翻译为：sizing，size classification，parting，batching ...