不可能，没门儿 是一种讽刺（sarcastically)的说法

　　A: Are you going to buy me a new coat for Christmas?

　　你会给我买件新外套当做圣诞节礼物吗？

　　B：Fat chance!

　　没门儿！

　　I think it's 50/50.

　　有一半的可能性

　　We have a 50/50 chance.

　　有一半的可能性

　　There is no hope.

　　几乎不可能

　　There is no possibility.

　　几乎不可能

　　There is no chance.

　　几乎不可能

　　Chance

　　是一种偶然的机会

　　Opportunity

　　是一种被给予、被许可的机会。

　　I was never given the opportunity of going to college.

　　我从来都没有机会上大学。

　　She left and I missed my chance to say goodbye to her

　　她走了，我错过了跟她说再见的机会。

　　This is a good opportunity to get a promotion.

　　这是个升职的好机会。

　　This is a too good chance/opportunity to be lost.

　　这是个不容错失的好机会。

　　Yes. It's my fault. So please give me a one more chance.

　　是我的错，请再给我一次机会。