Opv
[医][=oral polio vaccine]口服脊髓灰质炎疫苗
🗣️ 情景例句
Chocolate?
巧克力？
Your unit price seems fair enough, but we're hoping for a higher discount rate.
单价似乎合理，但我们希望给予更高的折扣率。
I like spring and summer.The days are long and the night are short.The sun rises early and sets late.
我最喜欢春季和夏季。因为此时白天长而夜晚短，太阳升得早而落得迟。