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Many people explain the meaning of purity (纯洁) to someone by giving the example of the lotus (莲花). The lotus is a plant growing in the dirty earth. But itsand flowers are not dirty at all. How does the lotus clean? Scientists have got the answer.

The lotus leaf is round and large on the water. It is almostto get it wet. Why? That's because the lotus leaf has a kind of wax (蜡) on its surface. The wax can keep the water away. If you put water on a lotus leaf, the water will get off it right away. At the same time, the dirty things will beaway by the water. This is the reason why the lotus leaf always stays clean. It's the same to the lotus flowers. So we often see the lotus in bright colors.