Study on backwash of biological aerated filter .

曝气生物滤池反冲洗过程的研究。

The backwash sequence includes the following steps .

冲洗的顺序包括下列步骤。

The water-skier was caught in the backwash from a passing motorboat , and fell off his skies .

滑水者卷入摩托艇驶过造成的回流中，并从滑水板上摔了下来。

Yet they are caught in the backwash of an anti-american rhetoric they help create .

但他们却陷入了一个反美言论，他们帮助建立反冲洗。

Instead of being reprocessed by the plant , the backwash water now is to be treated in the sweetwater wetlands .

不是被提炼厂的,现在是用水冲洗的斯威特沃特湿地对待.