名词
中文翻译：第二谐波
同义词：
['secondary harmonic', 'harmonic second例句：1. The spectrum of light is made up of the first and second harmonics.（光的光谱由第一和第二谐波组成。）']
例句：
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1. The spectrum of light is made up of the first and second harmonics.
光的光谱由第一和第二谐波组成。
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2. The scientist used a spectroscope to observe the second harmonic.
科学家使用分光仪观察了第二谐波。
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3. The second harmonic is often used in laser technology.
第二谐波常用于激光技术中。