Rff
abbr. remote fiber fluorimetry 远距离光纤荧光测定法
🗣️ 情景例句
My instructor thought that the beginner's class was too easy for me.
老师认为初级课程对我来说太容易了。
Never too old (or late) to learn.
学到老，学不了。
Those women are very hard-working.
那些姑娘很勤快。