加上了这第三个规则，该模型准确地再现了密集人群的动态，以及稀疏人群的动态。
With this third rule added, the model accurately reproduced the dynamics of dense crowds as well as those of sparser ones.
这些地区的污染将变得更加糟糕，因为随着水分蒸发，水中的污染将变得更加密集而不是更稀疏。
Pollution in the area will have become worse because as the water evaporates, pollutants in the water become more concentrated and less diluted.
第一条——或者说是最前方的壕沟被称为前哨壕，在密集缠结的铁丝网后分散布置了稀疏的机枪位。
The first, or front, line of trenches was known as the outpost line and was thinly held by scattered machine gunners distributed behind dense entanglements of barbed wire.
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