In contrast, the roots of grasses and other small plants may help to hold loose soil fragments together, thereby helping to prevent erosion by the wind.
相反，草和其他小植物的根可能有助于把松散的土壤碎片固定在一起，从而助于防止风的侵蚀。
Zhang Huayao is an engineer who has spent nearly two years helping to build the massive wind farm.
张华耀是帮助建设此项巨大风电场的工程师，在此已经工作了近两年的时间。
These are the batteries that go into electric cars, or the batteries that are ending up helping to make sure that if you get solar power or wind power, that it can be transmitted in an efficient way.
这是装进电动汽车的电池，这种电池最终会使用太阳能或者风能，能够以一种有效方式加以转化。
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