gravel bed

常見(jiàn)例句

Whenever they heard his tires crunch on the gravel driveway they would scramble to hide under their beds.
衹要一聽(tīng)到他的輪胎碾過(guò)車道上的碎石路他們就會(huì)趕緊爬到他們的牀下躲起來(lái)。
The cool, clear waters with loose gravel beds hold some 2, 000 bull trout nests, among the highest concentration in the world.
涼爽清澈的河水，還有松散的碎石河牀擁有2000外歐鱒巢穴，是世界上歐鱒巢穴最密集的地方。
The tools were located in a series of gravel, sand, and mudstone beds and included picklike tools, basic hand axes, and broken pieces of stone left behind in the tool-making process.
這些工具遺跡位於一系列的礫石、沙灘和泥巖牀上，包括類似鎬的工具、基本手持工具和在工具制造過(guò)程中殘畱的碎石片等。