英语翻译When are we the happiest in our life?According to a new

英语翻译
When are we the happiest in our life?
According to a new resrarch,seventy-four-year-olds are the happiest people.
Scientists from Germany and America questioned 21000 men and women about when they are the happiest in their life.The reault shows that happiness delines from the teenage years until 40.It levels off until 46 and then starts to increase until 74.
The change in happiness is clearer among British respondents.Germans are on the stable levels of happiness in their life.
Dr Carlo Strenger,one of the scientists from Tel Aviv University,said,"If you make fruitful use of what you have discovered about yourself in the first half of your life,the second half can be the most fulfilling."
So,from now,let's begin to try our best!