For copper, she said, the LC50 (the concentration lethal to half of any given species over a certain time) decreases with temperature - meaning that toxicity increases.
她说，对于铜来说，半数致死浓度lc50(一定时间内受试动物半数死亡的毒物浓度)随温度减弱-这就意味着毒性增加。
Tests on shoppers' bags revealed half contained traces of E.coli, a lethal toxin which killed 26 people in Scotland in 1996 in one of the worlds worst food poisoning outbreaks.
对购物袋的检测发现：半数残留大肠杆菌。1996年在苏格兰26人因这种毒素死亡，是世界上最严重的食品毒素爆发事件之一。
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。
When injected or inhaled, as little as one-half milligram of ricin is lethal to humans.
当注射或吸入少量，仅半毫克的蓖麻毒素就会致死。
Tests on shoppers' bags revealed half contained traces of E. coli, a lethal toxin which killed 26 people in Scotland in 1996 in one of the worlds worst food poisoning outbreaks.
对购物袋的检测发现：半数残留大肠杆菌。1996年在苏格兰26人因这种毒素死亡，是世界上最严重的食品毒素爆发事件之一。
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。
Spells are hurled back and forth until Harry delivers a crushing blow with a devastatingly powerful and potentially lethal spell... a spell he learned from the Half-Blood Prince.
法术是投掷来回，直到哈里提供了毁灭性的打击，以毁灭性强大和可能致命的法术…拼写他从混血王子。
Spells are hurled back and forth until Harry delivers a crushing blow with a devastatingly powerful and potentially lethal spell... a spell he learned from the Half-Blood Prince.
法术是投掷来回，直到哈里提供了毁灭性的打击，以毁灭性强大和可能致命的法术…拼写他从混血王子。
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