roof valley

• 屋顶排水沟

roof valley的用法和样例：

例句

1. A roofer is repairing the leaking valley.
   一个房顶工人正在修理漏水的屋顶排水沟。
2. Window eaves and roof gutters curve in organic efficiency rather than follow a mechanical right angle.
   窗檐和屋顶排水沟呈曲线，自然流畅，不循那机械的直角。