Middle-range theories provide a form of theorizing that lies between abstract grand theorizing and theoretical local descriptions.

中层理论提供了一种介于宏大的抽象理论化与局部的理论叙述之间的理论化的方式。

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Now that we know it's common among animals, Range says, scientists need to revise their theories about why it evolved.

兰奇说，既然我们知道这种能力在动物界也很常见，那么科学家们应当修正关于追随视线能力演化的理论。

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So successful were these theories in accounting for a wide range of chemical properties of the elements that the monatomic-gas electron configurations came to be thought of as chemically inviolate.

这些理论如此成功地解释了元素很广泛的化学性质，以致于，人们逐渐认为：在化学上，“单原子气体电子构型”不可违背。

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Theories range from design faults and construction errors to a rush to finish the job and budget constraints.

ECONOMIST: The aftershocks from a collapsed airport terminal

No-one knows why: theories range from the notion that it might have an antibiotic effect to the idea that it makes algae less appealing to munching zooplankton.

ECONOMIST: Aerobiology

Theories range from disaffected royalists to rebellious tribesmen.

BBC: Lao people