1. （门等的）铰链，合页
A hinge is a piece of metal, wood, or plastic that is used to join a door to its frame or to join two things together so that one of them can swing freely.
e.g. The top swung open on well-oiled hinges.
用润滑良好的铰链固定的盖子一旋转就打开了。
相关词组：hinge on
名词铰链；合叶动词给（某物）装铰链网络转轴；合页；枢纽