sure thing 

英汉解释

毫无疑问的事；必然要发生地事情

同义词

n. certainty，foregone conclusion

反义词

n.   precariousness，uncertainness，uncertainty

参考例句

1. It is no fun betting on a sure thing.
对必然要发生的事打赌是毫无意义的。
2. According to my strategy, )the payoff for building a )city here is a sure thing!
依照我的策略，）建筑的高潮一）城市这里是一件确信事物！
3. Buying property is a gamble. Getting the right help when it counts can turn that gamble into a sure thing.
房地产投资就是一场赌博，在适当的时候得到帮助就能够将其变成囊中之物。

英英解释

n.
  1. something that is certain

网络释义

sure thing
确实; 真实; 当然！; 当然;
Sure-thing principle
确定性原则;
The Sure Thing
犯贱情人; 校门外; 校门外/犯贱情人;