sand running-down 砂土流失 ; 沙土流失
down stream sand injection 泵后加砂注入
down sand 丘砂
Lay down in the sand 躺下来在沙滩上吧宝贝
I was going to sand down the chairs and repaint them.
我打算用砂纸打磨这些椅子然后重新刷漆。
The water was always laden with pebbles, gravel, and sand, known as glacial outwash, that was deposited as the flow slowed down.
水里总是遍布鹅卵石、砾石和沙子——它们被称为冰水沉积，是在水流减缓时沉积下来的。
She rushed outside in time to see a half-mile wide mud and sand thundering down the hill toward them, knocking over hundreds of trees.
她及时跑了出去，看到半英里宽的泥沙从山上轰隆隆地向他们冲来，撞翻了几百棵树。
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