@sri_srikrishna Transient time matters for things like Skagitt Valley. It was a choir practice, that's usually a limited period of time, 2.5 hours in that case. Of course others may use the space before or after, but also may not.
@sri_srikrishna 瞬态时间对于像斯卡吉特谷这样的事情很重要。这是一次合唱练习，通常是有限的时间，在这种情况下是 2.5 小时。当然其他人可以使用之前或之后的空间，但也可以不使用。