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题目材料:
In their hunt for energy, fungi have become the earth's predominant source of rot and decay. Whenever you observe mold forming on a piece of bread, or a pile of leaves decaying into compost, or a blown-down tree moldering into pulp on the ground, you are watching a fungus eating. Without fungus action the earth would be piled high with the dead plant life of past centuries. In fact, certain plants that contain resins toxic to fungi will last indefinitely; specimens of redwood trees, for instance, can still be found resting on the forest floor centuries after having been blown down.
以上解析由 考满分老师提供。