Heteroexcimer
异激态原子
🗣️ 情景例句
What's the difference between A and B?
A和B有什么不同？
The mailbox is over there.
邮筒就在那儿。
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。