You cannot appreciate happiness unless you have known sadness too.

不知道什么是忧伤，就不会真正感激幸福。

Being with you is like walking on a very clear morning.

和你在一起就像在一个清爽的早晨漫步。

It is never too late to fall in love.

爱永远不会嫌晚。

To the person you may be the world.

对于世界，你可能只是一个人，但对于某个人，你却是整个世界。

Love is something eternal; the aspect may change,but not the essence.

爱是永恒的，外表可能改变，但本质永远不变。

Love is not a matter of counting the days.

It's making the days count.

爱情不是数着日子过去，它让每个日子都变得有意义。

What a meaningful sentence!  To the person you may be the world.