convex joint

例句：

1. 1. The car's engine is a complex assembly of various parts, including the convex joints.
   汽车的引擎是一个由各种部件组成的复杂装配，包括凸形接头。
2. 2. The bridge's structure is designed to withstand heavy loads, with the convex joints being particularly strong.
   这座桥的结构设计用来承受重载，特别是凸形接头非常坚固。
3. 3. The scientist used a microscope to examine the surface of the sample, paying special attention to the convex joints.
   这位科学家使用显微镜检查了样本的表面，特别关注凸形接头。