Seroconversion
n. [生][医]血清转化
🗣️ 情景例句
How do you like China so far?
你喜欢中国吗？
How long are you going to stay here?
你要在这里停留多久？
Dad, this bag is too big. We can't carry it.
爸爸，这个包太重了，我搬不动。