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

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。

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The ecologist is concerned primarily with the quantities of matter and energy that pass through a given ecosystem, and with the rates at which they do so.

生态学家主要关注的是流经某一生态系统的物质和能量的量以及它们的速度。

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Scientists transmuted matter into pure energy and exploded the first atomic bomb.

科学家们使物质转化为纯能量，爆破了第一枚原子弹。

《柯林斯英汉双解大词典》

All right. The other thing I have to teach you is matter-energy interaction so that we can see how the Balmer series validates the Bohr model.

好的，我要教你们的里一个知识点是,物质能量的相互作用，我们可以见证,巴尔末线系是怎样证实波尔模型的。

麻省理工公开课 - 固态化学导论课程节选

Einstein's formula reveals the energy in nuclear reactions that convert matter into pure energy--something physically impossible with chemical reactions.

FORBES: Yellowcake Fever

In many cases, they do not have access to abundant sources of energy and have sought efficiency as a matter of energy independence--in the case of (No. 2) Denmark as an urgent national priority since the oil shocks of the 1970s.

FORBES: Magazine Article

Light particles passing through the void would be expected to lose a little more energy than those passing through space cluttered with matter - if dark energy is stretching the Universe apart at a faster and faster rate.

BBC: NEWS | Science/Nature | Great 'cosmic nothingness' found