Human activity may have influence on the concentration of ice nucleus.
人类活动对冰核浓度也有影响。
Single cell of INA bacteria can not act as ice nucleus, therefor the key to the study on the relationships between INA bacteria and frost injury to plants is to study the population of INA bacteria.
由于单个的冰核细菌细胞并不具有冰核活性，因此，研究植物上冰核细菌的种群数量或密度是研究冰核细菌与植物霜冻害关系的关键。
Single cell of INA bacteria can not act as ice nucleus, therefor the key to the study on the relationships between INA bacteria and frost injury to plants is to study the population of INA bacteria.
由于单个的冰核细菌细胞并不具有冰核活性，因此，研究植物上冰核细菌的种群数量或密度是研究冰核细菌与植物霜冻害关系的关键。
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