课本网

TPO对于我们的托福备考非常有用，大家还在苦于找不到资料吗？下面小编给大家带来托福TPO5阅读真题文本翻译及答案Part1，希望可以帮助到你们。

托福TPO5阅读真题文本Part1

Minerals and Plants

Research has shown that certain minerals are required by plants for normal growth and development. The soil is the source of these minerals, which are absorbed by the plant with the water from the soil. Even nitrogen, which is a gas in its elemental state, is normally absorbed from the soil as nitrate ions. Some soils are notoriously deficient in micro nutrients and are therefore unable to support most plant life. So-called serpentine soils, for example, are deficient in calcium, and only plants able to tolerate low levels of this mineral can survive. In modern agriculture, mineral depletion of soils is a major concern, since harvesting crops interrupts the recycling of nutrients back to the soil.

请关闭浏览器的畅读模式或者取消屏蔽JavaScript的正常运行，避免出现内容显示不全或者段落错乱。

原网页地址：https://www.potelypower.com/xuexi/456532.html