To the source to the indoor radon, have put forward and reduced the density measure of indoor radon effectively.

针对于室内氡的来源，提出了有效降低室内氡的措施。

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They also noted the firmness of the skin on the women's foreheads and cheeks, and used X-rays to measure the density of their bones.

研究者还特别留意了女性们前额以及脸颊皮肤的紧实度，并且运用X光测量了骨质的密度。

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So it's just a measure of how much does one given atom want to pull away electron density from, let's say, an adjacent atom.

因此，它就是度量一个给定原子有多么，想把电子密度拉过来，可以说，从相邻的一个原子那里。

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Another way to measure bone-density is called peripheral bone mineral density testing.

VOA: special.2010.08.31

So you can think about how these 2 things combined are going to be electronegativity, which is a measure of how much an atom wants to pull electron density away from another atom.

因此你可以想象出,这两样性质合起来就是电负性，也就是一个度量，关于一个原子,有多希望把另一个原子的电子密度拉过来的。

麻省理工公开课 - 化学原理课程节选

So it's just a measure of how much does one given atom want to pull away electron density from, let's say, an adjacent atom.

因此，它就是度量一个给定原子有多么,想把电子密度拉过来，可以说，从相邻的一个原子那里。

麻省理工公开课 - 化学原理课程节选

The researchers twigged that this phenomenon could be used to measure density and, as they report in the Journal of Agricultural and Food Chemistry, they set about this task by erecting a stack of two off-the-shelf neodymium magnets separated by a vertical vial of paramagnetic fluid.

ECONOMIST: Monitor

The trouble is, there has never been an automated way to measure breast density in a mammogram.

NPR: Online Calculator Estimates Breast Cancer Risk

Height loss can alert doctors to osteoporosis that other tests miss, particularly those that measure bone density in the wrist or hip.

WSJ: Health Journal: Yes, You Are Getting Shorter