Backheating
反加热; 回热
🗣️ 情景例句
but we have to get going
但我们必须走了，
What is the longest river in this country?
这个国家最长的河是什么？
What a pity! Never mind. We must get together some other time for a chat.
真可惜！不过不要紧。我们必须找个时间聚一聚、聊一聊。