link pin

例句：

1. 1. The car's engine needs to be replaced with a new one.
   汽车的引擎需要用新的替换。
2. 2. The engineer used a link pin to connect the two pieces of metal together.
   工程师使用一个连接销将两块金属连接在一起。
3. 3. The scientist used a link pin to measure the distance between two points on the map.
   科学家使用一个连接销来测量地图上两点之间的距离。