With a higher density of people in the cities, there are more street vendors.
由于城市人口密度高，有很多街头小贩。
If you also have low bone density, your risk is even higher.
如果骨密度还比较低的话，那可能性就更大了。
Higher channel density is good for improving the cell performance.
流场细密化有利于电池性能的提高。
The higher the average surface electronic density is, the lower the surface energy is.
表面原子层电荷密度越大，表面能越低。
Light weight, higher energy density, small volume.
轻便，高能量，体积小。
Light weight, higher energy density, small volume.
轻便，高能量，体积小。
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