a tube that carries blood to the heart from the other parts of the body

the frame of a leaf or an insect's wing

a narrow layer of a substance that forms in or fills a crack in rock

A rich vein of iron ore was found in the hillside. 山坡上发现了储量丰富的铁矿矿脉。

a particular quality or characteristic

A vein of satirical anger runs through all his work. 在他的所有作品中，字里行间都充满了嬉笑怒骂。

In its bid to be elected, the party is attempting to tap (= use) an underlying vein of nationalism in the country. 该党正试图利用国内潜在的民族主义倾向来竞选上台。

a style or a temporary mood

The opening scene is very violent, and the rest of the movie continues in (a) similar vein. 影片一开场就充满暴力，而其余部分也是类似风格。

After laughing about the photograph, they began to talk in (a) more serious vein about the damaging effect it could have on his career. 他们笑过那张照片之后，开始认真谈论它可能会对他的事业造成的破坏性影响。