... 间接作用 indirect action 辐射的间接作用 indirect action of radiation 间接污染 indirect contamination ...
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Theoretical analysis and indirect detection indicated that the pollen contamination rate of this pollination technique was no higher than 1%. But there is no evidence from direct detection by now.
的生物学特点，实践上常采用不套袋杂交授粉技术，理论分析和间接检测结果证明这种杂交授粉方式的花粉污染率低于1% ，但到目前为止仍缺乏直接的检测证据。
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