Galactometry
[医] 乳[液]比重测定法
🗣️ 情景例句
I must have see you somewhere before.
我一定在哪里见过你。
Do you live in the city?
你在城市里居住吗？
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？