Cassegrain
n. 卡塞格伦望远镜(亦作Cassegrain telescope)
🗣️ 情景例句
Believe me, I won't.
放心， 我不会的。
I'm very well, and you?
我很好，你呢？
Well, we listened to lectures about pollution, agriculture, nuclear waste, radiation and so on.
噢，我们听取有关污染、农业、核废料、辐射等讲座。