A common laboratory source of light is provided by a mercury arc.
通常的实验室光源选用汞弧灯.
辞典例句
Whatever gives off light is termed the source of light.
凡是能放射光的东西称为光源.
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The bonfire in the middle, symbolizing the source of light, possesses incomparable light and heat.
中间的篝火象徵著光明的来源, 源源不断地传播光和热.
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Any body, when heated to a sufficient high temperature, becomes a source of light.
任何物体, 当它被加热到足够的高温时, 就变成了一种光源.
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