Costless
a. 没有成本的, 不需花钱的
✅ 同义词
🗣️ 情景例句
Grandpa taught me.
爷爷教我的。
We want to cancel the contract because of your delay in delivery.
由于贵方交货拖延，我方要求取消合同。
Are you able to come tomorrow?
明天你能来吗？