LOS ANGELES — By the time the most important show on NBC’s prime-time schedule,“Heroes,” returns to the air on Sept.22,i

问题描述:

LOS ANGELES — By the time the most important show on NBC’s prime-time schedule,“Heroes,” returns to the air on Sept.22,it will have been out of sight for nine long months.
return to the air (是消失的意思吗?)

不是 .这段话是意思是美国全国广播公司的《英雄》这个节目在远离人们视野9个月之后重新在电波中开播.