I recently heard a story about a famous scientist. When he (ask) why he was able to succeed, he gave the answer. It all came from an experience with mother when he was about two years old. "I was trying to get a bottle of milk from the fridge when I lost the bottle and it fell, spilling (溢出) the milk all over the floor-a sea of milk! I got (frighten) and I didn't know what to do!" he said.
Instead of (punish) him, his mother asked him to play in the milk for a while. Then she said, " You know, we failed in how to (successful) carry a big milk bottle with two tiny (hand) just now. Let's go out in the yard and fill the bottle water to see if you can discover a way to carry it."
This famous scientist then remarked that it was at that moment that he (know) he didn't need to be afraid to make mistakes were actually opportunities for learning something new. Even if the experiment "doesn't work", we usually learn something (value) from it