IBM's "green" data center was designed with a specific air flow to optimize the cooling system. Cool air is pumped in from below this raised floor so that it flows to the front of server and storage systems. Alternating with these "cold aisles" are "hot aisles," where the backs of server and storage racks are facing. In the hot aisles are vents to pull that hot air out through the ceiling. Rather than pile all manner of cabling below the floor, this facility has only power cords below the floor and only networking cables on top--set up to ensure that there aren't blockages to air flow.
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Alternating with these "cold aisles" are "hot aisles," where the backs of server and storage racks are facing.
交替与这些“冷通道”的“热通道”，其中服务器和存储机架的背面面对。
This section details how to make surface and volume resistivity measurements with these test fixtures, as well as the Alternating Polarity and Alternating Voltage techniques for measuring resistivity.
本节详细介绍如何使用这些测试夹具来进行表面电阻率和体电阻率的测量，以及测量电阻率时使用的变换极性和变换电压的技术。
These will be divided into alternating zones, with six glazed storeys that have identical floor plates followed by five plates with irregular plans forming terraces.
建筑立面有几个形式极为特殊的空间，每隔六层就有一个五层高的不规则排布，它们是有绿色植物的阳台。
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