gravel bottom信息详情
砾石底
gravel───n.(Gravel)人名;(英、法、西)格拉韦尔;n.碎石;砂砾;vt.用碎石铺;使船搁浅在沙滩上;使困惑
bottom───n.(Bottom)人名;(英)博顿;vi.到达底部;建立基础;vt.装底;测量深浅;查明真相;adj.底部的;n.底部;末端;臀部;尽头
gravel lock───碎石闸
gravel rash───砾石皮疹(非正式)
clingstone gravel───粘石砾石
gravel binder───砾石粘结剂
aquarium gravel───水族馆砾石
tamping gravel───夯实碎石
gravel pack───砾石过滤层
They scoop up insects and larvae, shellfish, and worms in their bill along with bits of gravel and mud from the bottom.───它把昆虫和幼虫、贝类动物以及蠕虫连同底下的碎石和泥土一起兜到嘴里。
Placer tin deposit in xupu occurs in alluvial sediment of quatemary system and cassiterite chiefly concentrates at the bottom of gravel layers.───溆浦砂锡矿床赋存在第四系冲积层中锡石主要富集在底部砂砾石层。
discovery of blocks of gravel which sank to the bottom of the sea trapped in ancient icebergs has sparked a new understanding of a bizarre group of creatures.───在古老冰川中的沉没海底的沙石块的发现引起了人们对奇异物种的新的认识。
They need well-oxygenated water, an absence of pollution and a fine gravel bottom for spawning.