Each layer may have secondary layers of objects arranged in a hierarchical, object-oriented, or relational order.

每个层都具有二级对象层，这些对象层按照层次结构、面向对象或关系顺序排列。

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This influences the order in which layers are drawn and, thus, which layers appear on top of others.

这将影响绘制层的顺序，以及哪些层显示在其他层之上。

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He was responsible for the the recognition of geological strata, and the theory that successive layers of geological formations (strata) contained a fossil record of life in chronological order.

地层的发现以及连续的地质构造(地层)包含的化石记录了按时间顺序出现的生命的理论都有他的功劳。

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As well as using the rover's X-ray spectrometer on Whitewater Lake and Kirkwood to determine the chemical elements present, and thus get a better idea of their mineralogical composition, the team needs to work out the order and position of the rock layers to tell them something of their relative ages.

BBC: Nasa's 'Oppy' rover could be rolling on Martian clays

First, compositing supervisor Marshall Krasser reminds us that in order to truly convey the number of layers in each of these shots, these slide shows would have to be ten times longer and far more detailed.

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He explained to me that his central realization was that he had to control the relationships between the different layers of the application stack in order to make sure that it could reliably deliver smooth movement.

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