I didn't expect them to be at daggers drawn over such a trivial thing.

我没料到他们为这一点小事竟会如此势不两立。

You and I are at daggers drawn.

我们的仇恨不共戴天，我与你势不两立。

They are at daggers drawn.

他们剑拔弩张。

The world lives at daggers drawn in a cold war.

世界在冷战中剑拔弩张。

The world lives at daggers drawn in a cold war.

世界在冷战中剑拨弩张。