Pcns
abbr. polar coordinate navigation system 极坐标导航系统
🗣️ 情景例句
What do you do when you are not working?
工作之余你有什么消遣活动？
Thoroughly to teach another is the best way to learn for yourself.
教学相长。
It is our satellite. It is quite near us in space.
它是我们的卫星。它离我们相当近，仅38万公里远。