Xrfs
abbr. X-ray fluorescence spectrometer X射线荧光分光计
🗣️ 情景例句
Keep cool.
保持冷静。
To follow her naughty brother
追赶顽皮刁钻的弟弟
he always insisted that it should be written out in full.
但他还是坚持要求将信的全文写在信纸上。