We all need positive energy. A person's life is a road with lots of difficulties and various negative emotions. Everyone will have the desperate time. Positive energy can help us go through this period of time. For example, I am sad about the exam yesterday. But an optimistic classmate encourages me to think in a good way and comfort me. I can recover soon. But if she also is as pessimistic as me, I won't have recovered so quickly. Maybe I will be sad for a long time. There are many similar things happening in our life. To live a better life, we need positive energy.
我们都需要正能量。人的一生是充满困难和各种负面情绪的一条路。每个人都有郁闷的时候。正能量可以帮助我们度过这段时期。例如，我为昨天考试的事而难过。但是一个乐观的同学鼓励我往好的方面想，安慰我。我可以很快地恢复过来。但是如果她也跟我一样悲观的话，我不可能这么快恢复心情的。也许我会伤心很久。在我们的生活中有很多这种类似的事情。为了生活得更美好，我们需要正能量。

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