一股刺骨的寒风席卷了荒野。

A ___bitter wind swept across the moors.

我们在探险期间面临着刺骨的低温。

We faced ___bitter temperatures during the expedition.

刺骨的寒冷使得长时间待在户外变得困难。

The ___bitter cold made it difficult to stay outside for long.