Sent_en: 2zh Sweeps occurs four times a year and helps networks and independent affiliates determine how much a fixed amount of time for commercial advertisement will cost (the higher the ratings, the more revenue for the networks selling the time to advertisers).
Sent_yy: “扫描”每年进行四次，帮助网络和独立的附属机构确定商业广告的固定时间（评分越高，网络向广告商出售时间的收入越多）。