Backflooding
地下水逆流
🗣️ 情景例句
Well, I didn't really exercise.
嗯， 我没有真的上健身课。
All is well that ends well.
结果美满都是好的。
No, she's much younger than I am. She only started here this term.
对，她年纪比我小得多。她是这个学期才进校学习的。