That's a deal和That's the deal有区别吗?

That's a deal! That's a good deal. That's a small deal. That's a deal和That's the deal有区别吗? you get the deal和that's a big 感觉美剧里有很多情况用deal,可是总糊里糊涂的,是that's the point的意思吗? even deal with a tooth that's killing you get the deal和that's a big deal是什么意思?感觉美剧里有很多情况用deal,可是总糊里糊涂的,到底是什么意思?是that's the point的意思吗? 请问：That's deal What's the rush? how do you do;what's up;that's a how do you do;what's up;that's a deal that is a deal that is a deal It's not that big a deal 为什么a在big的后面? It's not that big a deal.怎么翻译?并且请解释语法结构 That's a deal.有的说是“一言为定”,有的说是“成交”到底是什么啊? That's a deal 金山词霸翻译“那是个交易”,感觉不对.PS：玩红警3时听莫斯克文说过~ Well,that's just the deal.A higher price will be out of my reach. I find___difficult to deal with our disagreement.A.that B.its C.that's D.it应该选哪个 That's a good