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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Sound travels through the medium of air.

声音通过空气介质传播。

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Electric power traveled through the medium of wire.

电力通过电线这个媒介物传导。

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"At the eisteddfod, all the performances should be through the medium of Welsh, " he said.

BBC: NEWS | UK | Wales | South East Wales | Language knocks out Punch and Judy

"It's an entire story told through the medium of street dance and hip hop" she said.

BBC: Call to join hip hopera cast in Milton Keynes

It is the myth of a supreme creator who is removed from the world and can only be reached through the medium of spirits.

ECONOMIST: The spirits that move Africa