promote的形容词形式

　　Briefly thrilling, but still - a promotional video.

　　有一点点惊险，但那毕竟只是- - -一段宣传片。

　　Libraries also use toolbars for promotional purposes.

　　图书馆使用工具栏也有提高业务的目的。

　　Just make sure not to come across as too self-promotional.

　　只需要保证没有太过自我宣传。