When the RE metal salt was 2%, the coating had the best density and hardness.

当稀土金属盐加入量为2%时镀层密度最大、显微硬度最高。

youdao

The average density of interstellar material in the vicinity of our Sun is 1,000 to 10,000 times less than the best terrestrial laboratory vacuum.

在我们的太阳附近，星际物质的平均密度比最好的地球实验室真空还要低1000到10000倍。

youdao

In America, the optimum density for the best use of road space is around 50 vehicles per lane-mile.

在美国，道路最佳使用效率的理想车辆密度大约是每车道英里50辆车。

youdao

Women must be informed of their own breast density, the associated risks, and the best available screening modalities for breast cancer relative to their breast density.

FORBES: Beware Overreaching Government Efforts to Detect Breast Cancer

The most common type of cholesterol problem is a high LDL (low density lipoprotein) which is usually best treated with a statin, of which there are at least four on the market.

CNN: Help me understand my cholesterol drugs

At this point, passage and enactment of Breast Density Inform Legislation is far and away the best path to making this happen.

FORBES: Beware Overreaching Government Efforts to Detect Breast Cancer