Trf
n. tuned radio frequency的简写
🗣️ 情景例句
He's a friend.
他是位朋友。
I do not know whether you realize it, but this condition is essential to us.
我不知道你是否了解，但是，这个条件对我们是必要的。
But I think the ones with nuts in them are nicer.
但我认为有果仁的那些更好。