In 1998 two drugs to prevent heart attacks , derived from rattlesnake and viper venoms , were approved .
在1998年经批准有两种药物可用来防止心脏病发作，就提取自响尾蛇和毒蛇的毒液。
Many snake venoms contain large molecules that can only enter the bloodstream through the body 's lymphatic system .
许多蛇毒中含有只能通过人体淋巴系统进入血液的大分子。
And now it is the turn of animal toxins , as researchers examine venoms secreted by snakes and lizards , to see if they , too , might be turned into treatments .
而现在轮到动物毒素了，因为研究者在检测蛇和蜥蜴分泌的毒液，来看它们是否同样可以转化成为治病药物。
The venoms are being studied as potential sources of pain-killers , fry said , because they work on the nervous system .
弗里表示说，南极章鱼的毒液有可能是止痛药物的潜在来源，因为它们也是作用于神经系统的。
Krait and cobra venoms , including that of the king cobra , act very quickly by crippling the nervous system .
