Greg says: certainly one death adder was found dead.

格雷格说：肯定是一只死亡毒蛇被发现死了。

Here, Greg is emphasising that there's no doubt that this is true, that the death adder was killed by the toxins in the cane toad.

在这里， 格雷格强调毫无疑问这是真的，死亡毒蛇是被甘蔗蟾蜍体内的毒素杀死的。