And half lethal dose was several hundred folds than the clinical dose.
半数致死量是推荐临床剂量的几百倍。
Through experiments have found that: when the concentration of heavy metals in the soil is 0.5 percentages, it fits the half lethal dose.
通过实验发现：当土壤中重金属的含量为0.5%时，最符合蚯蚓的半数致死量。
Through experiments have found that: when the concentration of heavy metals in the soil is 0.5 percentages, it fits the half lethal dose.
通过实验发现：当土壤中重金属的含量为0.5%时，最符合蚯蚓的半数致死量。
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