An alarm to stop a head on car collision.

在警示汽车将要发生碰撞时的警报声。

But a variety of threats cloud the panther's future, including car collisions and panther-on-panther territorial spats, the two leading causes of death.

然而，美洲狮的未来因为各种威胁而蒙上阴影，包括车祸，还有美洲狮之间的领域争夺，这是美洲狮死亡的两个主因。