n.虎鲸，逆戟鲸，杀人鲸

The orca is the largest member of the dolphin family.
虎鲸是海豚家族中最大的成员。
Orcas are known for their complex social structures.
虎鲸以其复杂的社交结构而闻名。
Killer whales have been observed hunting in groups, a behavior called cooperative predation.
人们观察到虎鲸成群狩猎，这种行为称为合作捕食。
Orcas are found in all oceans, from polar to tropical waters.
虎鲸分布在所有海洋中，从极地水域到热带水域都有。
These intelligent marine mammals are capable of learning and problem-solving.
这些聪明的海洋哺乳动物能够学习和解决问题。
In some areas, orcas have formed tight bonds with humans, assisting them in fishing.
在某些地区，虎鲸与人类形成了紧密的关系，帮助他们捕鱼。
Orcas communicate through a variety of clicks, whistles, and calls.
虎鲸通过各种各样的咔哒声、哨声和叫声进行交流。
Scientists are still studying the different dialects spoken by various populations of orcas.
科学家们仍在研究不同虎鲸种群使用的各种方言。
Some orcas feed primarily on fish, while others prefer marine mammals like seals and sea lions.
有些虎鲸主要以鱼类为食，而其他虎鲸则更偏爱海洋哺乳动物如海豹和海狮。
Conservation efforts are underway to protect endangered populations of orcas from threats such as pollution and habitat loss.
正在采取保护措施来保护面临污染和栖息地丧失等威胁的濒危虎鲸种群。