Rarify
vt. 使成精细；使变稀薄\\nvi. 变稀薄；纯化
🗣️ 情景例句
Come on in, Mrs. Cooper.
请进 Cooper太太。
If you agree to carry the calf, they'll make you carry the cow.
得寸进尺。
while our own compulsory school attendance became law in Germany in 1642,
而我们的义务教育成为法律在德国是在1642年，