Fat chance 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!
可能性
有一半的可能性
I think it’s 50/50.
We have a50/50 chance.
几乎不可能
There is no hope.
There is no possibility.
There is no chance.
Chance vs. Opportunity
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。