Hbeag
乙型肝炎e抗原
🗣️ 情景例句
What are you working on?
你在干什么？
Ignorance is bliss.
眼不见为净。
Oh, a lot of different things! One machine helps them to put rice in bags.
能做好多不同的事情呢！比如能帮助农民把大米装袋等。