英语翻译快乐是最重要的,但也是全世界最难办到的事!

happiness is the most important thing but the most difficult to reach

Happyness is not only the most important ting,but also the most difficult thing in the world.

Happiness matters, yet is hard to get.
Happiness is usually the ultimate goal of one's life.
But you have to earn it.

Happy is the most important and the hardest thing in the world.

Being happy is important, but it is also the most difficult thing in the world!

Life is most important .While in the world,it is the hardest to accomplish .

Happiness is the most important, but also the world's most difficult to do something!