Ptap
[医] 磷酸铝沉淀精制白喉类毒素
🗣️ 情景例句
I wonder whether I might ask you a question.
我是否可以问你一个问题？
Where drums beat,laws are silent.
战鼓一响，法律无声。
How did the bees know exactly in which diection to fly?
蜜蜂是怎样确切地知道朝哪个方向飞呢？