bank-run gravel

• 岸流砂砾,岸砾石,河岸砂砾

bank-run gravel的用法和样例：

例句

1. The clear, bright water chuckled over gravel.
   清澈晶滢的水从砂砾上汩汩地流过去。
2. Detritus usually consists of gravel, sand and clay.
   岩屑通常是由砂砾、沙和粘土组成的。