Xrfs
abbr. X-ray fluorescence spectrometer X射线荧光分光计
🗣️ 情景例句
Eleven o'clock, approve the sketches for the toy spaceship.
十一点钟， 批示玩具太空船的草图。
Turn down the radio please.
请放低音量。
Is this a book?
这是一本书吗？