There are the obvious: like turning light into chemical energy like plants do. Or eating plants like many animals do.

最明显的方式是：植物将光能转化成化学能，或者有些动物吃植物来维持自身能量。

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She wrote that racism became real for her like the turning on of a light.

VOA: special.2009.10.04

This slowly moving clump was composed entirely of sodium atoms, effectively turning light into matter.

BBC: NEWS | Science/Nature | Cool clouds turn light to matter

"The overall effect is not going to be turning a light switch off" and banishing the entire US to darkness come the stroke of midnight, says Memo Diriker, director of the European-American Business Institute at Salisbury University.

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There are some points of value, such as turning off a light from afar, adjusting a thermostat or checking if you left the oven on.

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