他练长跑已经不少日子了的英文

he has been doing long distance running exercise for a long time now

• 他:    he
• 练:    white silk
• 长跑:    long-distance race ...
• 已经:    already
• 日子:    day; date
• 了:    finish; complete; ...

例句与用法

1. He has been doing long distance running exercise for a long time now .
   他练长跑已经不少日子了。