average grain diameter

• 平均粒径

average grain diameter的用法和样例：

例句

1. Furthermore, grain size analysis was undertaken for the sediment samples from the Cezi-Jinshan section in Hangzhou Bay by a Malvern Mastersizer 2000 laser grain size analyzer.
   实验结果显示，该断面上沉积物平均粒径在垂向上具有不同的变化趋势，并伴随着显著的波动性。