Facebook has disguised the system as a simple upgrade to Flyers, its much-derided system for selling cheap ads on a self-service basis.

Facebook将该系统伪装成一种简单的Flyers升级版，后者在自我服务的基础上销售廉价广告，因而备受诟病。

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Second, increases the self - service as well as on - line selling area propaganda and the guidance.

二是加大自助服务以及网上营业厅的宣传和引导。

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Supermarkets are large self-service stores selling every kind of food-fresh, canned or frozen.

超级市场是大型自助商店，出售各种食品-新鲜的、罐头装的或冰冻的。

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There are over two million sellers on eBay, and there are also over twenty-one million self-employed workers, many of whom rely on selling goods on the internet and shipping them through the Postal Service for their livelihood.

FORBES: Like It or Not, the US Postal Service Isn't Going Away Anytime Soon