Pcns
abbr. polar coordinate navigation system 极坐标导航系统
🗣️ 情景例句
No way. I must get everything ready before noon.
不行啊，我必须在中午前把一切都做好。
I'm Clifton, and I've been associated with this project since the beginning.
我叫克里夫敦，从一开始我就参与了这项计划。
Even a telescope in orbit round the earth, like the very successful Hubble telescope, would not be suitable because of the dust particles iron solar system.
即使是一台放置在围绕地球的轨道上的望远镜——如非常成功的哈勃望远镜——也因为太阳系中的尘埃微粒而无法胜任。