植物的水中根系就如同人类小肠中的绒毛，吸收的面积十分庞大。
The fluff in the human small intestine of root system in water of the plant, the area absorbed is very huge.
乙酸处理减少根系活跃吸收面积，柠檬酸能明显提高根系活力。
Acetic acid could reduce active absorbing area of roots while citric acid could increase roots activity.
根系发达、根系活跃吸收表面积及总吸收表面积大的品种，有较强的耐铜毒性。
The rice varieties with strong root system, large active absorption root surface and total root surface area had strong tolerance to copper poison.
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