undercourse

undercourse

美  英

  • n.衬层;底层
  • 网络下层

英汉解释

n.
1.
衬层
2.
底层

例句

Revetments must be sturdy and durable, able to resist damages caused by various factors. Their undercourse must not be scoured.

对上下游护坡的要求是坚固耐久,能抵抗各种因素的破坏作用,并保证底层不受淘刷。