You can only post 3 free ads in the same category per day.

您每天最多能发布3条同一类别的免费广告。

youdao

There have even been attempts to offer free telephone services in return for listening to ads.

还有人尝试提供免费电话服务来回报听广告的用户。

youdao

There's no charge for the application - it's completely free - and there are no ads popping up either.

这款应用程序不收取一分钱——它是完全免费的——也没有弹出广告。

youdao

The free site,supported by ads, has a team of full-time editors.

VOA: special.2009.02.26

The firm has also offered free video games punctuated with ads to customers in Greece, and free text messages to Czech students who agree to accept ads in the same format.

ECONOMIST: Mobile advertising

There is a basic free level with ads where you can share and download limitless songs and playlists.

FORBES: Sean Parker And Daniel Ek's Plan To Save Music

Though Hiya will launch as a free app without ads, WhitePages plans to monetize it once it has developed a following.

FORBES: WhitePages Wants To Be Your Location-Aware Mobile Address Book