sure thing （答应建议或要求）当然，一定；毫无疑问的事，必然的事；一定成功的事；准赢的赌注

【例句】
This proposal is by no means a sure thing.
这个提议绝不会理所当然地获得通过。

Little miss wants to see big daddy? Sure thing.
小姑娘想见爸爸了是吧？肯定是。