我向你保证这种事不会再次发生。

I give you my word that this won't happen again.

《牛津词典》

我向你保证，你不会后悔告诉了我的！

You won't repent of having told me, I assure you!

youdao

不过同样身为一个父亲，我敢向你们保证的是，父母们的爱是从来不会远离他们深爱着的孩子的心的。

But as a dad, I can assure you, a parent's love is never far from their child's heart.

youdao