Venomous snakes and fierce beasts (referring to dangerous animals or, metaphorically, cruel and rapacious individuals).
在这片原始森林里，毒蛇猛兽出没无常，所以探险者必须格外小心。
In this primeval forest, venomous snakes and fierce beasts roam unpredictably, so explorers must be extra careful.
Next Idiom