For optimum density measurements, detector contact with the wellbore is critical.

为了获得最佳的密度数据，传感器是否与井壁接触非常关键。

youdao

The accumulation of damage in the composites is quantified through high-precision density measurements before and after compression.

测定了这些复合材料的静、动态压缩性能，并通过材料压缩前后密度变化的测量，定量表征了材料的累计损伤。

youdao

Looking at 671 women with an average age of 55, the researchers said they were able to predict osteoporosis conditions to the same extent as the bone density measurements.

研究者称：通过对671名平均年龄是55岁的妇女的研究发现，他们有能力在骨密度测量同样程度下预测骨质疏松症的情况。

youdao

The study is said to be the first to examine in detail measurements of bone strength instead of bone density.

VOA: special.2009.03.10

Unlike any other asteroid known today, Vesta has an iron core surrounded by layers of mantle rock and crust, similar to Earth and Mars, preliminary gravity and density measurements suggest.

WSJ: Asteroid Vesta Gets a Close Study

One-hundred-and-two holes have been dug so far and 1, 100 measurements have been made of ice thickness, snow density and other features - data deemed vital by scientists evaluating the future of the Arctic sea-ice.

BBC: Arctic team gives up on ice radar