Pixe
[化] 质子激发X射线发射分析
🗣️ 情景例句
Welcome.
欢迎你。
What is the type of furture?
这是什么类型的家具？
So he couldn't buy himself lots of good things. But he had lots of friends instead.
所以他不能给自己买很多好东西。可是他却有许多朋友。