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Chapter 单元 :

Standard 5 五年级，Food Chain and Food Web 食物链与食物网

When number of the eagles (Consumer) increases excessively, more food (chicken) needed. This will result decrease of the number of chicken. When the number of chicken decreased, there are excessive of foods (Grasshopper) for chicken. Thus, the number of the grasshopper will increase, and more paddy being eaten by grasshopper.

当老鹰数量（消费者）增加，它所需的食物（鸡）量也增加。所以更多的鸡只将成为老鹰的食物。由于鸡只被吃，鸡的数量会减少。当鸡的数量减少，蚱蜢的数量就会增加，更多的稻将成为蚱蜢的食物。