requisite variety

基本解釋

Variety purity test is the requisite for variety protection and seed production of maize, which plays great role in maize production.
品種純度檢驗是玉米新品種保護及種子生產(chǎn)的技術(shù)依據(jù)，對玉米生產(chǎn)具有重要影響。
There seems to be a "requisite variety" -- a minimum complexity or diversity of parts -- for such processes as self-organization, evolution, learning, and life.
似乎存在著一種“必需的多樣性”――一種最小限度的復(fù)雜性或個體間的差異――適用于諸如自我組織、進化、學(xué)習(xí)和生死這些過程。
In his Law of Requisite Variety, Ashby pointed out that the complexity of a management system would be bound to correspond to the complexity of the controlled object system.
阿什比的“必要的多樣性”定律指出，管理系統(tǒng)的復(fù)雜性需要與管理對象系統(tǒng)的復(fù)雜性相適應(yīng)。

Of course, there are the requisite spa treatments (almost uniformly outstanding) and fitness classes, and much to Miraval's credit, the variety and availability of both make it easy to cram your day full of activities rather than wait around for that one afternoon slot for the hot-stone massage.
FORBES: Magazine Article