包票

shì shang méi yǒu dǎ bāo piào de shì

世上没有打包票的事。

There are no guarantees in the world.

wǒ jī hū kě yǐ dǎ bāo piào nǐ yī dìng huì chéng gōng

我几乎可以打包票，你一定会成功。

I can nearly guarantee that you will succeed.