优秀的守门员，不该把自己想得太渺小

I saw a cartoon today, the cartoon shows us a football match.What's interesting in this game is：The football players think the goalkeeper is too strong. The goalkeeper, however, thinks himself is too weak, both sides made unrealistic illusions about each other.

So this cartoon tells us one thing：when we are determined to do something, we should be confident and optimistic. But in reality, we find that many people fail because they are overly pessimistic. So in the face of difficulties, we should be more positive energy, not negative energy.

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总结：

football match足球赛

goalkeeper守门员

however可以放中间，前后用逗号隔开

both sides双方

made unrealistic illusions about each other不切实际的幻想

tells us one thing告诉我们一个道理

are determined to do决心做

overly pessimistic过度悲观的

Pessimism悲观