Recycling firms are the obvious exception, but even they deal in a variety of goods whose prices do not always move in lockstep.

循环回收公司明显是个例外，但是他们处理的物品许多不再这个连锁的处理过程之内。

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The question is whether these trends undermine the quality of books which are being published, by breaking a business model that has let firms focus on variety and range.

问题是破坏企业专注于多样化和范围的商业模式的趋势，是否会降低出版图书的质量。

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A wide variety of designs for vertical farms have been created by architectural firms.

建筑公司绘制了大量垂直农场的设计图。

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For situations such as this, a variety of firms provide data and services that help financial advisers pick apart hypothetical performance in broad strokes or granular pieces.

FORBES: Prep Your Portfolio for Disaster With a Stress Test

There's nothing like a bleak outlook and stunning losses from a variety of finance firms to put a damper on leap-day festivities.

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It was not too long ago that consumers nationwide had a wide variety of firms to choose from.

FORBES: Too Big To Fail, Too Small To Succeed