They can also measure the geometry of space. That allows them to deduce the total densityofenergy and matter in the universe and infer the amount of dark energy.
他们还能通过测量空间几何推断出宇宙中能量和物质的总密度，并推算暗能量的总和。
2
Electrolyte is one of the key materials of synthesis of lithium ion battery of high densityof power, high densityofenergy, long circular life and good capability of security.
电解质是制备高功率密度、高能量密度、长循环寿命和安全性能良好的锂离子电池的关键材料之一。
3
The bone densityof the mandibular angle and coxofemoral region can be measured with dual-energy X-ray absorptiometer.