Seroconversion
n. [生][医]血清转化
🗣️ 情景例句
And my grandfather.
还有我祖父。
Don't be afraid he will get there on time.
不要怕他会准时到那里。
New jobs are needed because a number of people are out of work.
因为许多人没有工作，所以需要为他们提供就业机会。