Seronegativity
血清阴性
🗣️ 情景例句
I feel lucky tonight.
今晚我觉得很幸运。
You've inherited a large estate!
你继承了一大笔遗产嘛！
It was raining heavily and they found that a stream had formed in the field.
雨下得很大，他们发现地上已经形成了一条小溪。