Ketos
克托斯铬锰钨钢
🗣️ 情景例句
How have you been?
你近来怎么样？
The mechanic repairs cars.
机工修理汽车。
and if a single curved glass would distort nature, how much more would a pair of them?
何况一片曲面镜就可歪曲自然，那么伽利略的两片曲面镜对自然的歪曲又该多大呢？