Rarifying
vt. 使成精细；使变稀薄\\nvi. 变稀薄；纯化
🗣️ 情景例句
Yes, I've been there a number of times.
我去过许多次了。
He was my sincere friend.
他是我诚挚的朋友。
She was choosing a book. He told her about the accident.
她正在选书。他将发生的情况告诉了她。