Opv
[医][=oral polio vaccine]口服脊髓灰质炎疫苗
🗣️ 情景例句
So am I.
我也很遗憾。
I guess you're right. It seems I'll be grounded.
我想你说得对，我看我该转到地勤了。
Wu dropped his stick! He stopped to get it and of course fell behind.
吴的接力棒掉地了！他停下捡棒，当然就落后了。