Low average population densities are characteristics of most underdeveloped countries.
平均人口密度低是大多数不发达国家的特点。
As densities increased, domestic architecture became larger, culminating in crowded pueblos.
随着密度的增加，住宅建筑变得更大，最终形成拥挤的村庄。
The cultivation of crops has expanded into progressively drier regions as population densities have grown.
随着人口密度的增长，农作物的种植已经扩展到了越来越干旱的地区。
Rock lobsters prey on sea urchins, and increased rock lobster densities coincided with significant decreases in urchins.
岩石龙虾以海胆为食，而岩石龙虾密度的增加正好与海胆数量的显著减少相吻合。
After several generations of population growth, people packed the landscape in densities so high that communal pueblos may have been a necessary outcome.
经过几代人的人口增长，人们以如此高的密度挤满了这个地区，以至于公共聚居地的出现可能是一个必要的结果。
By compiling a map of seismic velocities from thousands of earthquakes across the globe, they can also begin to map temperatures and densities throughout the mantle.
通过编制全球数千次地震的地震速度图，他们还可以开始绘制地幔的温度和密度图。
The densities of the terrestrial planets average about 5 times the density of water, whereas the Jovian planets have densities that average only 1.5 times the density of water.
类地行星的密度的平均值大约是水的密度的五倍，而类木行星的密度平均值只有水的密度的1.5倍。
Crown of thorns starfish normally live in high population densities.
刺冠海星通常生活在聚居的环境中。
However, near hydrothermal vents, areas of the ocean where warm water emerges from subterranean sources, live remarkable densities of huge clams, blind crabs, and fish.
然而，在海底热液喷口附近，也就是温暖海水从地下涌出的地方，生活着大蛤、盲蟹和鱼类，数量非常庞大。
If the two media have really different densities, like air and water, then most of the energy is going to be reflected back, very little of it will keep going and get transmitted into the new medium.
而如果这两种介质的密度相差较大，就像空气和水那样，那么大部分的能量将会折射回来，只有一小部分会继续传播进入到新的介质中。
Our Stipple params create varying densities of noise to simulate that look.
我们的画点画参数创造不同密度的噪音模拟的期待。
The push pin color scheme shows population densities based on the color spectrum.
pushpin颜色方案基于色谱显示人口密度。
Instead, fracture densities increase in the vicinity of faults or shear zones.
相反，裂缝密度在断层和剪切带附近增加。
With no natural enemies, their densities reached 10 to 100 times that of Argentina.
因为没有天敌，火蚁的种群密度达到阿根廷的十倍甚至百倍。
The content of the survey involved the volume density, surface and length densities.
内容涉及到各种组织的体积分数、面积密度、长度密度等。
In large parts of America, where population densities are lower, it would be much costlier.
而在美国，由于人口密度更低，投递费用还会更高。
The current densities are approximately the same as for the cables, or slightly higher.
电极电流的密度和电缆的密度几乎相同或稍微高一点。
Many branches were closed, and by 2006 Sweden had one of the lowest branch densities in Europe.
许多分行关闭了。到2006年，瑞典成为欧洲分行密度最低的国家之一。
Fracture densities also increase in dolomitic layers compared to limestones and anhydrates.
与石灰岩层和脱水层比，在白云岩层的裂缝密度也有所增加。
Materials with high densities often contain atoms with high atomic Numbers, such as gold or lead.
高密度材料通常由较大原子序数原子构成，例如金和铅。
Materialss with high densities often contain atoms with high atomic Numbers, such as gold or lead.
高密度材料通常由较大原子序数原子构成，例如金和铅。
Since density is mass divided by volume, the relative densities and relative sizes give the relative masses.
由于密度是质量除以体积，相对密度和相对大小给予相对群众。
These major arms have the greatest densities of both young, bright stars and older, so-called red-giant stars.
这些主要臂上有最大密度的年幼明亮恒星和较老的红巨星。
However, at times of high vector densities the relative importance of mosquito-to-human transmission may increase.
不过，在媒蚊密度较高时，蚊虫向人传播病毒的相对重要性可能增加。
And the electronics industry needs much greater data densities for tomorrow's iPods, smart phones, and other devices.
为了明天的新iPod、智能手机和其他电子产品，现代电子工业需要更大的存放密度和更长的存放时间。
Stewart points out, as a general rule plastic is difficult because there are so many densities and ranges of type.
斯图尔特指出：“一般来说，塑料的选择是很困难的，因为它有多种密度和类型。”
Our friend Schr? Dinger told us that if you solve for the wave function, this is what the probability densities look like.
我们的朋友薛定谔告诉我们，如果你用波函数来解决，你就会知道这些概率密度看上去的样子。
This means that they have gargantuan densities — a thimbleful of magnetar material would have a mass of 100 million tons.
这意味着它们有巨大的密度——一丁点的磁星物质就会有100万吨的质量。
This means that they have gargantuan densities — a thimbleful of magnetar material would have a mass of 100 million tons.
这意味着它们有巨大的密度——一丁点的磁星物质就会有100万吨的质量。
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