这个环保项目得到了政府的全力支持。

The environmental project has strong government ___backing.

这首歌在简单的钢琴伴奏下听起来更美。

The song sounds even more beautiful with simple piano ___backing.

这幅画背面有一层硬纸板做支撑。

The painting has a cardboard ___backing for support.