Microbiota
[医] 微生物区[系]
🗣️ 情景例句
Don't be so miserable!
别这愁眉苦脸的。
What shall I send hin for his anniversary?
我要送他什么东西作为周年纪念礼物？
Both girls write to each other regularly now.
现在这两位姑娘定期通信了。