英语词汇gravel bed怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	gravel bed
释义	gravel bed 美/ ?ɡr?vl bed / 简明释义砾石层网络释义 1 ?砾石层砾石层短语 1 gravel bed filter 砾石滤床过滤器 ; 颗粒层除尘器 2 gravel-bed 卵石河床 3 clay-gravel bed 粘土砾石双语例句 1 The water is infiltrating the gravel bed. 水正渗透进碎石底层。 2 There have been different views on origin of the clay-gravel bed in Guilin area. 关于桂林粘土砾石层的成因问题，已经有几种不同意见。 3 There is no graded gravel bed to buy, transport, handle at the job site, and install. 没有分级砾石床的购买、运输、工作现场的处理和安装等问题。
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