学生们举着写有环保标语的横幅在校园里游行。

The students carried ___banners with environmental slogans during the campus parade.

网站顶部滚动着一条节日促销的横幅广告。

A holiday sale ___banner is scrolling at the top of the website.

环保组织在清洁能源的旗帜下团结起来。

Environmental groups unite under the ___banner of clean energy.