这种鱼体内的神经毒素会导致严重的神经系统损伤。

The ___neurotoxin in this type of fish can cause severe damage to the nervous system.

这种蛇的毒液含有强效的神经毒素，能迅速麻痹猎物。

The snake's venom contains a potent ___neurotoxin that quickly paralyzes its prey.