Quadric
a. 二次的\\nn. 二次曲面
🗣️ 情景例句
and an advance payment waiting for you
和预付稿酬等你来
I get into bed at about 11:30 and go right off to sleep.
我大约在11:30上床并且睡觉。
A telescope would have to be as far away as the planet Jupiter to look for life in outer space, because the dust becomes thinner the further we travel towards the outer edges of our own solar system.
望远镜要放置在木星那样遥远的行星上才有可能在外层空间搜寻生命。因为我们越是接近太阳系的边缘，尘埃就越稀薄。