act as lookout
望风
(或cave something in)(with reference to a roof or similar structure) subside or collapse or cause something to do this
(屋顶等)下陷，坍塌，倒塌；使下陷，使倒塌
the ceiling caved in.天花板塌了。Len's club would have caved his skull in.伦的棍子就已经把他脑袋打陷下去了。
the ceiling caved in.
天花板塌了。
Len's club would have caved his skull in.
伦的棍子就已经把他脑袋打陷下去了。