a juggling troupe的用法和样例：
- If we view our lives as a juggling act or a sort of sporting contest, we learn to go along with the limitations and obstacles that are dealt us.
- There is a vein of melancholy in his character.
- There was a long lag in forwarding mail to us.
- A bowl of hot chicken soup is good for you.
- A cloud is a mass of vapor in the sky.