... radical基；根；原子团；游离基；自由基 radicular system absorption根系吸收 radioactive half-life放射性半衰期 ...
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根系吸收面积 root absorbing area
根系吸收表面 the roots assimilating surface
根系氮素吸收速率 Nitrogen inflow
植物根系对水分的吸收 Asorption of water by roots
水被牢牢地吸住以至于不能被大多数植物根系吸收。
Water is held so tenaciously that most plant root systems cannot absorb it.
各种林木生理所需的水分是通过根系吸收土壤中的水分而得到的。
A great variety of woods absorb their physiologically needed water through roots in the soil.
白天蒸腾作用散失的水分超过根系吸收的水分，因而叶子的水势就下降。
During the day water loss by transpiration exceeds water absorption by the roots and leaf water potential decline.
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