Polyketone
聚酮
🗣️ 情景例句
Have a good trip.
旅途愉快。
Why don't you like me?
你为什么不喜欢我呢？
To his astonishment, the bee began to perform a dance on the surface of the honeycomb.
冯·弗里施就透过玻璃进行观察。