This is the most difficult reason to sell because valuation is part art and part science.

这是最艰难的卖出理由，因为估值是局部的艺术也是局部的科学。

youdao

These masks and headdresses themselves are a very part of the art.

这些面具和头饰本身就是艺术的一部分。

youdao

Children appear to have it down to an art and for the most part they don't need self-help books or therapy.

孩子们似乎已经把它归结为一门艺术，而且在很大程度上，他们不需要自助书籍或治疗。

youdao

She would one day be part of this world and would make her own rebellious art.

VOA: special.2009.07.12

So I think education is a great part of the art, and yeah.

所以我觉得教育也是艺术很重要的一部分，是的。

演技要磨练出来 - SpeakingMax英语口语达人

And they can take part in art, poetry, creative writing classes and book discussion groups.

VOA: special.2009.01.28

Part art and part science, haggling is more than a means to save money.

BBC: The art of haggling

Once again, it is important to understand that antenna design needs to be carefully done and even then it is part science and part art, and the antenna experts who work on these devices clearly understand the art part.

FORBES: The iPhone 4 Antenna Unravelled

"It's about adult play, making a space different to other shops and offering things like art and music as part of the shopping experience, " says Staton.

BBC: Shopping: The new tactics to get you spending