the concave bottom of an empty hair spray container一个空发胶罐的凹形底

He sighed, his concave chest rising and sinking with resignation.他叹了口气, 他凹陷的胸口也随之上下起伏。

a concave stomach凹陷的肚子

The weight of the upper container has concaved the lid of the one beneath it.上方容器的重量把放在它下方的容器的盖子给压得凹进去了。

Some of the cars have concaved roofs.有些车的车顶呈凹形。