改进题：Advertisers must realize that people usually are motivated by the goal of satisfying some combination of two or more needs, and the needs may be both conscious and unconscious.

译文：广告人都要明白，通常能够满足两个或者更多有意识以及无意识地需要的综合目标才能促使人们购买。

改进题：Advertisers must realize that people usually are motivated by the goal of satisfying some combination of two or more needs, and the needs may be both conscious and unconscious.

译文：广告人都要明白，通常能够满足两个或者更多有意识以及无意识地需要的综合目标才能促使人们购买。

改进的译文：广告人必须明白，通常能够满足两个或者更多需要的综合目标才能促使人们购买，而且这些需要既可能是有意识的，又可能是无意识的。