Obligations
n. 义务；债务；承付款项（obligation的复数）
✅ 同义词
🗣️ 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。
Is there any discount for the USA Railpass?
火车通行证有折扣吗？
You're crazy!
你疯了！