Pixe
[化] 质子激发X射线发射分析
🗣️ 情景例句
Can I ring you up?
我可以给你打电话吗？
Can you guess what I was doing this morning?
你能猜到今天上午我在做什么吗？
Jack is the strongest boy in the class.
杰克是全班最强壮的男孩。