Pixe
[化] 质子激发X射线发射分析
🗣️ 情景例句
My niece is getting married,
我侄女即将结婚，
He comes bothering me day after day.
他每天都跑来打扰我。
If, at the time, the British had not feared invasion, it would have been completed.
如果不是因为那时英国人害怕入侵，隧道早已建成了。