直到18世纪，人们还依赖于来自植物、动物和人类肌肉的能量来为自身提供动力。
Until the eighteenth century, people relied on energy derived from plants as well as animal and human muscle to provide power.
在受污染的市区，他们还促进臭氧的产生，臭氧是对动物和植物生命有潜在毒性的烟雾的关键成分。
In polluted urban areas, they also enhance production of ozone, a key ingredient of smog that is potentially toxic to animal and plant life.
袋鼠是食草动物，吃多种植物，有的还吃真菌类。
Kangaroo is a herbivore, eating a variety of plants, fungi and some food.
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