So suburb-ringed cities with low overall densities are much less efficient than those that are tightly-packed.

所以，总体密度的郊区环的效率要比那些紧密的很多。

It was also very low density, just what you'd expect for a loosely bound rock pile.

它的密度也很，正如你所想象的的松散的岩石堆。

They discovered that patients with depression had a lower density of synapses than healthy people of the same age.

他们发现，抑郁症患者的突触密度于同龄的健康人群。

But, despite their length, tails are incredibly low density, as low as a few hundred atoms per cubic centimeter.

但是，尽管尾巴很长，它的密度却得令人难以置信，到每立方厘米只有几百个原子。

First, there's Looser zones, which are bands of low bone density that form on the surface of the bone.

首先，会有Looser区，即在骨表形成的密度带。 小编注：Looser区以瑞士外科医师Emil Looser命名。

Wyoming has the lowest population overall, but Alaska, which is by far, the largest state has the lowest population density.

蒙大拿州总体上人口最少，但阿拉斯加是远远最大的州，人口密度最。

Whereas this is much squishier, this is low density polyethylene.

虽然它更柔软， 但它是密度聚乙烯。

Small city, we have low density, make the design more romantic.

小，我们密度，让设计更浪漫。

The comet has a very low density, similar to rubble-pile asteroids, so it was expected that the surface would be soft.

彗星的密度非常，类似于碎石堆积的小行星，所以它的表会是柔软的。

Meanwhile, lighter substances with lower density, like plasma, move to its center.

与此同时， 密度较的较轻物质，如等离子体，会移动到它的中心。

However, even people who exercise often can have low bone density.

然而，即使是经常运动的人，骨密度也会偏。

Then, you go to medium density, low density and higher density again.

然后，您再次进入中密度、密度和更高密度。

Objects with lower density, like stuff that's made of organic materials, will allow more of the lower-energy X-rays to pass through.

密度的东西，像有机材质的东西，会让能级的X射穿过。

Let's start with a fun city that has a pretty low population density.

让我们从一个人口密度很的有趣开始。

Hargett was surprised when the doctors told him that he had low bone density.

当医生告诉他他的骨密度很时，Hargett 感到很惊讶。

Northern forests offer the lowest human density of any tiger habitat, and the most complete ecosystem.

北方森林是所有老虎栖息地中人类密度最的， 也是最完整的生态系统。

But unlike similarly large nations, the nordic countries have some of the lowest population density in the world with only 26 million total residence.

但是不同于其他差不多积的国家，北欧国家人口密度是世界上数一数二，总人数只有 2600 万。

The research team found a link between raised levels of a type of cholesterol called LDL, low density lipoprotein, and the development of disease.

研究团队发现，这种名为密度脂蛋白（简称LDL）的胆固醇水平的升高与患痴呆症有关联。

This is important: a gas giant like Jupiter has a low density, and a rocky metallic planet like Earth has a very high density.

像木星这样的气体巨星密度很，而像地球这样的岩石金属行星密度很高。

Therefore, when we go for a swim in the Dead Sea, our body stays afloat on account of having relatively lower density than the surrounding water.

因此，当我们在死海中游泳时，我们的身体保持漂浮状态是因为它的密度比周围的水。