这种新材料具有高能量密度，因为它能够以比目前更高的电压的电极材料储存更多的锂离子个单一的百分比数字。
The new material has such high energy density because it can operate at a higher voltage than current electrode materials and also store more lithium ions.
事实上，因为有中国的很大一部分土地交通不便且荒凉的，主要人口中心的密度远远高于这些数字所显示的。
In fact, because a large part of China is inaccessible and inhospitable, the density in the main population centres is much higher than those figures suggest.
一些不同的数字调制信号有着相同或相近的功率谱密度，但它们的谱相关函数却有明显区别。
Different types of digitally modulated signals that have similar, if not identical, power spectral density functions can have highly distinct spectral correlation functions.
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