Xrf
abbr. X-ray fluorescence X射线荧光
🗣️ 情景例句
Do you want to sit by the window?
想靠窗坐吗？
I invited him to come over, but he wouldn't.
我请他过来，但是他不肯。
The temperature drops to -- 30 o and very few people attempt to cross the Pass.
气温下降到零下30度，试图跨越山口的人寥寥无几。