n.深的伤口(裂缝等）
v.（使）负深伤
He was bleeding from a gash on his head. 他头上的伤口在出血。
I was frightened when I saw the nasty gash in her arm. 她胳膊上又深又长的大伤口吓坏了我。
n.煤气制造工厂
n.煤气罐
