Revex
直齿锥齿轮粗拉法
🗣️ 情景例句
Nets for tennis and badminton and so on.
有网球和羽毛球用的网等等。
At open doors dogs come in.
狗从开着的门中进来。
Indeed, we lack practice and experience nowadays in dealing with primitive conditions.
确实，我们今天缺乏对付原始环境的实践和经验。