Polyfluoride
多氟化物
🗣️ 情景例句
No,
记不起来了。
No man (or one) is wise at all times.
聪明一世糊涂一时。
In the class there are two American girls. They are twins. Their names are Lily and Lucy.
在班上有两个美国女孩，他们是双胞胎，名字叫鲁茜、莉莉。