You can't roll back the clock and remove all exotics or fix habitats.
你不能让时光倒流，消除所有外来物种或修复栖息地。
2
Appearances can deceive, ecologists caution, and many of these exotics may be considered acceptable only because no one has documented their harmful effects.
Yet appearances can deceive, ecologists caution, and many of these exotics may be considered acceptable only because no one has documented their harmful effects.