menacingly

The wolf growled menacingly as it began to circle the frightened sheep.

(Chinese) 当狼开始围着受惊的绵羊转圈时，它发出了威胁性的低吼。

The stranger stepped menacingly toward the door, holding a heavy iron bar.

(Chinese) 那个陌生人手持沉重的铁棒，杀气腾腾地走向门口。