Slothbears also have relatively large canine teeth, which appear to be more functional for fighting than for foraging.
树懒熊也有相对较大的犬齿，它们似乎更适合战斗而不是觅食。
2
Like brown bears and polar bears, slothbears may have evolved in an environment with few trees.
和棕熊和北极熊一样，树懒熊可能是在树木稀少的环境中进化而来的。
3
Because slothbears are smaller than brown and polar bears and are under greater threat from dangerous animals, they may have adopted the extra precaution of carrying their cubs.