My opponent has the experience of studying abroad.So English is a piece of cake for him.
我的对手有留学经历，所以英语对他来说是小菜一碟。
Well,you don't have a prayer of beating your opponents.
哦，你击败对手的希望落空了。

I don't think I have a prayer to be chosen for the job.
我觉得这次面试可能没戏。
Don't be so pessimistic.
别那么悲观。

精讲部分

I failed the interview.
I don't have a prayer.
Have a prayer是“对某事心存希望，祈祷某事成真”的意思，那么此处否定形式就是“希望落空，没有希望”的意思。如果某人don't have a prayer,那就是说就算求上帝也帮不上忙，可见形势相当糟糕，希望渺茫。如:She is now forty,and doesn't have a prayer of getting married.她现在40岁了，已经没希望出嫁了。