An insertion.

镶嵌。

That which is set in.

镶嵌物。

The direction of flow, as of a current.

流动方向(如水流)。

The frame or bed in which a gem is set.

镶宝石之框架或底座。

A background for a play or story.

(常用单数)(戏剧或故事之)背景。

Act of one who or that which sets.

安置；安装；装配。

Scene in which anything takes place; environment.

(常用单数)(事物发生之)背景；环境。

The music composed for a text (as a poem).

为歌词所配的音乐；谱曲。

Descent (of the sun, moon, etc.) below the horizon.

(太阳、月亮等)落下。