joint angle

例句：

1. 1.The surgeon carefully measured the joint angle of the patient's knee before performing surgery.
   外科医生在做手术前仔细测量了患者的膝盖关节角度。
2. 2. The carpenter used a joint angle to ensure the wooden planks fit perfectly together.
   木匠使用关节角度确保木板完美地拼接在一起。
3. 3.The engineer calculated the joint angle to optimize the design of the bridge for safety and stability.
   工程师计算关节角度以优化桥梁的设计，确保安全和稳定。