Colds mutate even while they're infecting you, and new strains pop up so often that by the time drug-makers create a vaccine against one variation, the serum is already out of date.
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22. 他的心肠真毒!
How cruel he is!;
《新英汉大辞典》
23. 探讨毒伞蕈中毒的临床特征及其治疗方法。
Investigate the clinical character of Amanita phalloides poisoning and effective treatment.
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24. 毒漆树毛茸茸的藤条落得满地都是。
Furry ropes of poison sumac veined across the ground.
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25. 它们亦用于杀菌以及防止肉毒中毒。
They're also used to kill bacteria and prevent botulism.
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26. 不过,这种巫毒过去经常受到节制。
But the voodoo used to be contained.
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27. 许多毒镖蛙会将其毒素隐藏在皮肤中。
Many poison dart frogs secrete lipophilic alkaloid toxins through their skin.
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28. 许多毒镖蛙会将其毒素隐藏在皮肤中。
Many poison dart frogs secrete lipophilic alkaloid toxins through their skin.