英语翻译生活肯定有困难的时候.开心,才是终点.

There will always be difficulties in life.Happiness is the final destination.

life will always meet troubles.try to be happy, that's the only solution.

正规点/文言点：
Difficulty is definitely part of life. Happiness is the ultimate purpose.
随意点：
Life surely has difficulties. Happiness is the end point.
人性化点：
We will definitely experience difficulties in life. To live a happy life is our final goal.