Unlike males, females don't travel far from their mother's home range, a major limiting factor in the animal's expansion.

母美洲狮与公美洲狮不同，它们不会远离母亲的栖地，这也是这种动物扩张领域的主要限制因素。

The first question is, how far they travel beyond the cat flap, which is what scientists call the cat's home range.

第一个问题是他们离家之后会走多远，这也就是科学家所说的猫的活动范围。