The admen are using balloons as promotional material.

广告商用气球作推销用的材料.

The admen are using balloons as promotional materials.

广告员正在把气球作为促销材料.

The admen are using balloons as promotional materials .

广告员正在把气球作为促销材料。

But admen are among the first to embrace the idea in earnest.

但是广告人是最早热心这个创意的的人之一。