这些光源为荧光灯，卤钨灯，短弧氙灯和金属卤化物灯等。
These light sources are the fluorescent lamp, halogen lamp. Short-arc xenon lamp and metal halide lamp.
通常的实验室光源选用汞弧灯。
A common laboratory source of light is provided by a mercury arc.
一个氙弧灯，其电极之间的电弧长度大于信封内附弧的直径。
A xenon arc in which the length of the arc between electrodes is greater than the diameter of the envelope enclosing the arc.
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