Be sure that you have never had any regrets in your life whi

e sure that you have never had any regrets in your life的意思是,确保你的人生中不会有任何遗憾.
which only lasts fo.这句子不完整,完整的应该是一个修饰your life的一个从句.
不完整就不知道整句意思是什么了