Rarify
vt. 使成精细；使变稀薄\\nvi. 变稀薄；纯化
🗣️ 情景例句
Now for the hard part.
现在到了最难的部分。
At 6 o'clock sharp.
6点。
We're going to help some farmers with their work.
我们打算去帮助一些农民干活。