复数：coulees
1.〈美〉斜壁峡谷;低地;(时干时流的)深山沟(山溪)
2.【地】熔岩流;(熔岩)岩席
1.a thick short flow of viscous molten lava
2.a deep gully formed by rain or melting snow and usually dry in the summer
3.a small stream, canal, or bayou
4.a streambed, sometimes dry
5.a broad shallow valley
couleescouleescoulees