The 2007 versions of these products were slightly longer (apparently mostly attributed to longer tobacco rods), and had slightly higher packing density, but slightly lower moisture content.

2007年版的产品略长(显然主要因为烟杆较长)填充密度较高，不过，水分含量略低。

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This high packing density accounts for the strength and stability of cement, which makes it useful for structures like tunnels and Bridges.

这种高堆积密度说明了水泥的高强度和稳定特性，使其成为隧道和桥梁等建筑物的理想材料。

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High packing density greatly impedes the cooling of the array.

高存贮密度很不利于阵列的散热。

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The ViewSonic VP3280-LED features a 31.5-inch LCD panel, packing 8.8 million pixels for a total density of 150 pixels-per-inch.

ENGADGET: ViewSonic VP3280-LED 31.5-inch 4K monitor prototype hands-on (video)

This imperfect, if not inverse, relationship between density and wealth is widely ignored by most urban core boosters, many of whom argue that packing people together is the true key to economic growth.

FORBES: Megacities And The Density Delusion: Why More People Doesn't Equal More Wealth