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- 取决于设置、你的职业或其他插件（详情见提示）
作用
将指定单位预计达到你设置的生命值所需的秒数与你设置的秒数进行比较，根据“模式”的设定，由近期的伤害、治疗或两者估算。生命值数值为负时，表示损失了那么多生命值。
为什么会用到它
Estimates how many seconds until a unit reaches a given health value, from the recent rate of damage and healing on it. Its main use is not wasting long effects on a mob that is about to die: skip Rend, Corruption or a long cooldown when the target will reach 0 health within a few seconds. A negative Health means a deficit from maximum health, and Mode picks whether damage, heals or both feed the estimate. It does not exist on Retail or WoW Forever, where health and the combat log are hidden from addons. See also 距离生命值百分比达到所需时间 and 生命值.
示例
你的目标的生命值降至 0 所需的时间 小于 6 秒，伤害和治疗
设置
条件编辑器中每项设置的含义，取自游戏内的帮助。
单位 - The unit this condition uses as the target of comparison.
生命值 - The target health the rule is waiting for 单位 to get to. If this number is negative, it means the health deficit (from max health).
运算符 - How to compare 距离生命值达到所需时间 with the 秒 value. This comparison uses basic mathematical comparison operations.
秒 - How many seconds (estimated) until 单位 reaches the target health.
模式 - How the burn rate should be calculated, which is used to estimate the time to target health.
伤害和治疗 - Both damage and heals on 单位 will be factored into the 'burn rate' (essentially mitigating damage with heals for a realistic burn rate)
仅伤害 - Only damage on 单位 will be factored into the 'burn rate', which will cause some spikes in time-to-target if they are healed.
仅治疗 - Only heals on 单位 will be factored into the 'burn rate', essentially pretending they are not being hit at all.