原文Once Acrobatic Cheerleader's ability triggers, it won't trigger again as long as it remains on the battlefield, even if the triggered ability is countered or the flying counter is somehow removed. If an effect would cause Acrobatic Cheerleader's ability to trigger again, that part of the effect won't do anything.
原文If Acrobatic Cheerleader leaves the battlefield and then returns, it's a new object with no memory of its previous existence. Its ability will be able to trigger again.
原文Survival abilities (and other abilities that trigger at the beginning of your second main phase) will trigger at the beginning of the second main phase you take in a turn. They won't trigger during your third, fourth, or other additional main phases in a single turn, if effects somehow cause you to have more than two main phases.
原文If a creature with a survival ability isn't tapped when your second main phase begins, the ability won't trigger at all. You won't be able to tap it during your second main phase in time to have that ability trigger.
原文If a creature's survival ability triggers but the creature leaves the battlefield before the ability resolves, use its tapped or untapped status as it last existed on the battlefield to determine whether or not the ability will do anything.