These negative qualities hinders its use because it results in high transport costs, difficulty in handling and storage, as well as low energy density.

这些负面性质阻碍其使用，导致高运输成本，处理和储存困难以及低能量密度。

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The great task that is before you now, Dear Ones, is the shattering of the band of deeply embedded negative thought forms that have formed as a field of low density energy that surrounds the Earth.

这项伟大的任务现在就在你眼前，亲爱的，正在震碎这帮深深嵌入的负面想法，而它们形成了一个围绕整个地球的稠密低级的能量场。

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For instance, time machines often are thought to need an exotic form of matter with so-called "negative energy density."

例如，通常时间机器被认为是需要一种奇异的有着所谓“负能量密度”的物质。

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