在北极地区，北极熊捕食者和海豹猎物之间的关系是典型的捕食者-猎物关系。

In the Arctic, the ___predator-prey relationship between polar bears and seals is a classic example of this dynamic.

在激烈的市场竞争中，大公司有时会像捕食者对待猎物一样吞并小企业。

In fierce market competition, big corporations often act in ___predator-prey relationships, swallowing small businesses.