O. n.
[医] 每夜
🧩 词语组成解析
[医] O型, 菌体型, 不动型(细菌)
abbr. 名词
🗣️ 情景例句
I hope that someday maybe you'll be able to visit my family in Beijing.
我希望将来有一天，你可以来北京到我家里作客。
Now or never.
机不可失，失不再来。
How often do you write?
你们隔多久写信？