It is the professional duty of the advertising agent to conceal his artifice.

隐藏自己的技巧，是广告公司的专业责任。

youdao

Advertising design, production, publishing, agent.

广告设计、制作、发布、代理。

youdao

Advertising design, production, publishing, agent.

广告设计、制作、发布、代理。

youdao