When I was in the six grade, my father bought a new water dispenser

（饮水机）. A day, I got some water from it, but the water tasted "dirty".

So I always drank from the water dispenser again. But my parents       

thought the water tasted just fine. On other day, my mother thought I

was thirsty. She filled her cup by water from the dispenser and gave       

it to me. I refused at first, but it was such hot that I drank it at last.

To my surprise, the water tasted well this time! Finally, I found out the

problem is my cup. I forgot to clean it last time, which made the

water tastes bad. This incident reminds me that sometimes we only

know one part of a story, so we might misunderstand it. We should remember to clean our "cups" and find the true.