Dr Conlon and colleagues have discovered a way to tweak their molecular structure, making them less toxic to human cells but more powerful germ killers.

康伦博士和同事发现了一个能改变它们分子结构的办法，使它们对人体细胞的毒性变小，但杀灭细菌的能力更强。

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That suggests that the sharks use a premeditated hunting strategy akin to that used by some human serial killers.

BBC: Earth News - Great whites 'plan' seal attacks