Nsi
[医][=no signs of infection]无传染病征兆
🗣️ 情景例句
Is this all Grandpa's stuff?
这里面都是爷爷的东西吗？
I didn't know whether to send the letter airmail or not.
我不知道是否送航空邮件。
The train was late but nobody knew the reason for the delay.
火车晚点了，但没人知道为什么。