bed sediment

• 河床质

bed sediment的用法和样例：

例句

1. Bed material samplers, as first developed, may be divided into three types.
   最初的河床质取样器有三种类型。
2. As the sampler is dragged along the bed, it collects a sample from the top layer of bed material.
   取样器沿河底拖动，收取表层河床质。