hinge line

例句：

1. 1. The hinge line of the door is broken, so it won't open.
   门的铰链线断了，所以它打不开。
2. 2.The car's suspension system relies on the hinge line to keep its wheels aligned.
   汽车的悬挂系统依靠铰链线来保持车轮对齐。
3. 3.The engineer carefully measured the hinge line and adjusted the screws to ensure a perfect fit.
   工程师仔细测量了铰链线并调整了螺丝以确保完美匹配。