Collision convention
[法] 碰撞公约
🧩 词语组成解析
🗣️ 情景例句
you have a meeting with the production staff
要与生产部门人员开会，
The worth of a thing is best known by the want of it.
物以稀为贵。
Now move the hand to and fro and around but not up and down.
然后把手前后左右以及旋转摆动，但不要上下摆动。