Gnotobiosis
限菌饲养
🗣️ 情景例句
I have just begun to learn and my serve isn't very good.
我刚刚开始学习，发球不太好。
As a senior, Peter is writing his thesis.
作为大学四年级学生，彼得正在写毕业论文。
A baby panda? Great! Let's go.
一只小熊猫？好极了。咱们走吧。