Since the effects of a measure or action do not occur simultaneously as the measurement is being made or the action is being carried out, the time lag between cause and effect has to be factored into the time plan for impact monitoring.
由于某项措施或行动实际付诸实施时，不可能立即发生影响，必须适当地考虑到在与随时测报影响的因果关系中的时间滞后现象。