1. The culling of seal cubs has led to an outcry from environmental groups. 宰杀海豹幼仔的行为已引起了环保团体的强烈抗议。
2. Although polar bears' locomotion is similarly inefficient, polar bear cubs walk along with their mother. 尽管北极熊的运动能力同样低下，北极熊幼崽还是和妈妈一起前行。
3. Black bear cubs use trees for defense, whereas brown bears and polar bears, which regularly inhabit treeless environments, rely on aggression to protect their cubs. 黑熊幼崽用树来防御，而经常生活在没有树的环境中的棕熊和北极熊则依靠攻击性来保护它们的幼崽。
4. Because sloth bears 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. 因为树懒的体型比棕熊和北极熊要小，而且面临着更大的来自危险动物的威胁，所以它们可能会带着幼仔采取额外的预防措施。
5. The lioness is still nursing her cubs. 这只母狮还在给它的幼崽喂奶。
