Cccdna
[化] 共价闭环DNA
🗣️ 情景例句
Not at all. It's my pleasure.
不客气。这是我的荣幸。
I'll probably go out for lunch at about 12:30.
我将可能在大约12:30去外面吃午餐。
when a significant number of people are living permanently in space.
如果有相当数量的人永久性地住在太空，