因此，生态系统以生物及其活动作为媒介，涉及能量和物质的循环、转化和积累。

Ecosystems thus involve the circulation, transformation, and accumulation of energy and matter through the medium of living things and their activities.

youdao

而唯心主义者则宣称世上所有的思想、能量和物质都是虚构出来的。

The idealist declares that all is mind or energy, and that matter is necessarily unreal.

youdao

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。

They can also measure the geometry of space. That allows them to deduce the total density of energy and matter in the universe and infer the amount of dark energy.

youdao

Again, notice how bodily, how material and physical Yeats's images of human energy are.

注意叶芝诗里人类能量,多和肉体物质相关的。

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