Prebiotic
a. 生命起源以前的
🗣️ 情景例句
It probably means he's clearing his throat.
也许表示他正在清喉咙。
What does he do?
他是干什么的？
Use the lab and prepare some plant food for young tomatoes.
用实验室为西红柿幼苗准备一些养分。