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- In systems theory there is a principle called the Law of Requisite Variety which states in order to successfully adapt and survive a member of a system needs a certain minimum amount of flexibility. 在系统理论中，有一个原则叫做必须变化法则，指的是系统中的一个成员为了更好的适应和生存，必须保持最低限度的灵活性。
- Have you the requisite visa to enter Canada? 你有进入加拿大必备的签证吗?
- A variety of food is sold at a supermarket. 超级市场各式各样的食物均有出售。
- A great variety of flowers were shown in the park. 公园里展出了很多品种的花。
- I have a variety of books at home. 我家中有好多书。
- His lecture ranged over a variety of topics. 他的演讲涉及到很多论题。
- The dish was accompanied by a variety of pickles. 这盘菜配有什锦泡菜。
- A variety of apple having fruit with dark red skin. 晚熟苹果一种皮的颜色为暗红色的苹果
- He left for a variety of reasons. 他由于种种原因而离开了。
- He hasn't got the requisite qualifications for this job. 他不具备这项工作所需的资格。
- All of them arrive late for a variety of reasons. 由於种种原因，他们都来晚了。
- She expect to achieve the requisite two-thirds majority for nomination. 她期望得到获得提名所必需的三分之二多数。
- A brown or yellowish-brown variety of garnet. 钙铝榴石，桂榴石一种褐色或黄褐色的石榴石
- Of a sumptuous, costly, or rich variety. 特等的豪华的、昂贵的或多种多样的
- The shop sells a great variety of porcelain ware. 这家店铺出售品种繁多的瓷器。
- What other ways do you know to add variety? 你知道其他增加变化的方法吗?
- The demand is for quality, variety and novelty. 现在需求的是质量、花式品种和新颖性。
- People like to live a life full of variety. 人们喜欢过丰富多彩的生活。
- A map is requisite for a traveler. 地图是旅行者必备的。
- law of requisite variety 必要变异定律
