1. The mean lethal dose was 12.
平均致死剂量为12 。

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2. Breaking the skin was enough to inject a lethal dose.
弄破皮肤足以注射致命剂量的毒素。

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3. 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。

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4. 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。

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