One day, a boy found the cocoon(茧) of a butterfly and brought it home. A few days later, the boy saw a small 1in the cocoon. He sat and watched for several hours as a butterfly struggled to make 2body through that little hole. Suddenly it stopped.
So the boy 3to help the butterfly, thinking the butterfly might be 4. He took a pair of scissors(剪刀) and cut the hole 5. The butterfly came out of the cocoon, but it 6a little different. It had a weak body and small, thin 7. The butterfly didn't start to fly. In fact, the butterfly spent the rest of its life crawling(爬行) around with a weak body and thin wings. It was never able to fly.
The boy acted with8but he didn't understand why it could be like this. When a butterfly crawl out of the cocoon, it must struggle. The hard work of 9out of the cocoon makes the fluid(液体) from the butterfly's body into its wings. It helps the butterfly be 10to fly. If the butterfly never has to squeeze(挤压) itself out of the cocoon, its wings will never get the fluid and it can never fly.11struggles are what we need in our lives. If we lived our lives without any problems, we would never learn or grow. We would not be 12 we could have been and we would never fly.
In our lives, pain and suffering is the key to all windows, and sometimes even 13 growth, without it, there's no way of life. We can't avoid 14 or problems. So, next time you are 15 a problem or difficulty, remember the butterfly. Struggle a little–then fly!
，
的终边上，则t的值为
