Opv
[医][=oral polio vaccine]口服脊髓灰质炎疫苗
🗣️ 情景例句
Mrs. Greenberg is on the phone.
Greenberg太太打电话来。
It is easier to give good counsel than to follow it.
提出忠告易，照著办事难。
From the Skeppsbron and surrounding islands the people watched this thing of beauty begin to spread her sails and catch the wind.
人们从斯开波斯布朗和周围的岛屿前来观看这艘美丽的战船扬帆起航，乘风前进。