英语词汇layer of gravel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	layer of gravel
释义	layer of gravel 简明释义砾石层：指由砾石组成的一层地层。网络释义 1 ?砾石层砾石层短语 1 layer of coarse gravel 粗石层 2 layer of sand and gravel 砂卵石层双语例句 1 It is wise to start infilling with a layer of gravel for drainage. 先铺上一层利于排水的砾石是个明智的做法。 2 Then a layer of gravel and a little water was applied and trampled solid. 然后铺一层砾石并洒上少许水用来踩实。 3 For the ground floor, the flat concrete roof has a layer of gravel to prevent heat from entering the building. 对于一层来说，混凝土平屋顶有砾石层防止热量进入建筑。
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