active life time的用法和样例：
- He realized the dream of his life time.
- Many dormant branches of our organization are now springing to active life.
- He intended to retire from active life, but fate had decided otherwise.
- If you really become absorbed in a hobby, your interest may last a life time.
- Other things help a beaver in his active life.
- In spite of his age, he still leads an active life.