Those were the best years of my life.
那些年是我一生最幸福的时光。
It's only human to want the best for your children.
为自己的孩子谋求最好的`条件是人之常情。
I just don't know what to do for the best.
我就是弄不清做什么才好。
Which one do you like best?
你最喜欢哪一个？
It was the best day of my life.
这是我一生中最美好的一天。