铯137可在生态系统循环数十年，被根系吸收后进入植物，并在植物死亡后再回到土壤。
Long-lasting particles of cesium 137 can cycle through an ecosystem for decades, entering plants when they are taken up by root systems and returning to the earth when the plant dies.
土壤微生物与植物的根系形成一个稳定的动态系统，在这个系统中它们之间相互作用，相互影响。
Soil microbes and plant root systems together form a stable dynamic system, where they interact with each other.
土壤—根系系统是SPAC水分连续体中重要的子系统。
The soil-plant system is a very important subsystem of the SPAC.
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