But how can you suddenly become allergic to grass or a cat?
可是，人怎么可能突然对青草或者猫过敏呢？
And how does grass know it's time to turn green?
草儿怎么会知道该是转青的时候呢？
Look, some children are playing games on the grass. How happy they are!
看，一些孩子在草地上玩，他们多开心呀。
Look, some children are playing games on the grass. How happy they are!
看，一些孩子在草地上玩，他们多开心呀。
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