conjunctional arc

例句：

1. 1. The two pieces of wood are joined together with screws.
   两块木头用螺丝钉连接在一起。
2. 2. The scientist found a joint in the rock that could be used to extract oil.
   科学家在岩石中发现了一个接合处，可以用来提取石油。
3. 3.The team worked together to achieve their joint goal of improving public transportation.
   团队共同努力，以实现改善公共交通的共同目标。