Most predators of waterfowl nests prey opportunistically on songbird nests, and removing these predators could directly increase songbird nesting success.
大多数水鸟的捕食者都有机会捕食鸣禽的巢穴,而消灭这些捕食者可以直接提高鸣禽筑巢的成功率。
Most of these people aren't that at all, they are mostly opportunistically thieves.
这些扒手大多数都不是这样的,他们大多是投机取巧的小偷。
This nationalist feeling has been exploited opportunistically by several important politicians.