Foldback
返送（系统）, 监听（系统）
🗣️ 情景例句
This is a good deal: buy 1, get 1 free.
这可是个好买卖：买一送一。
Forest fire caused by lava
熔岩引起的森林大火
She wanted to see the doctor because her back hurt.
她是来伦敦看望女儿的。她要看医生是因为背痛。