介绍:
It's a deal一言为定。
It's a deal,I'll pick you up tomorrow morning.
一言为定，我明早来接你。
You can use my car this weekend.It's a deal.
你周末可以用我的车。一言为定。
I'll let you know as soon as she comes back.It's a deal.
她一回来我就告诉你。一言为定。
