While this may be the first time in history that a single species can precipitate a mass extinction event, it is also the first time in history that a single species can act to prevent it.
While this may be the first time in history that a single species can precipitate a mass extinction event, it is also the first time in history that a single species can act to prevent it.
一个单一物种能够导致大规模的物种灭绝，这可能是历史上的第一次；同时，一个单一物种能够采取行动来阻止这种变故的发生，同样也是历史上的第一次。