"Polar bear" 用英语说就是 "polar bear"。它的来源是英语 "polar" 和 "bear" 的组合。"Polar" 意思是 "北极的"，"bear" 意思是 "熊"。
例句：
The polar bear is a large marine mammal found in the Arctic. (北极熊是一种生活在北极的大型海洋哺乳动物。)
Cpmate change is affecting the habitat of the polar bear. (气候变化正在影响北极熊的栖息地。)
The polar bear is an apex predator in the Arctic. (北极熊是北极地区的顶级捕食者。)