They want it to continue being a black art.

他们希望它继续成为一种魔法。

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However, recharging NiCad batteries is a black art.

然而，给镍镉电池充电却是一个黑色艺术。

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Modifying propellers is a bit of a black art, and beyond the scope of this article.

修改螺旋桨是有点黑艺术，超出这篇文章的范围。

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To be fair, wireless technology is something of a black art.

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In the way that rock and roll started out as a black art form and now it's overwhelmingly white, will one day white rappers be the majority?

NPR: Book Looks at White Youth and Hip-Hop Culture

For their wedding gift, he created a piece of art: two small globes on a black plastic base torqued in so they appear to be kissing.

CNN: 'Museum therapist' challenges idea of art