Orthopositronium
正阳电子素; 正电子对素
🗣️ 情景例句
How do you say that in English?
那个用英语怎么说？
Would you like me to take you around introduce you?
现在让我替你向大家作介绍好吗？
I have been trying to get my new room in order.
我试图把我的新房间收拾整齐，