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照片是由光线对底片发生作用而形成的。
Photographs are produced by the action of light on film.
youdao
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初步分析了光线照射影响四溴乙烷合成反应的作用机理。
The mechanism of light influencing the addition reaction was also studied.
youdao
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初步分析了光线照射影响四溴乙烷合成反应的作用机理。
The mechanism of light influencing the addition reaction was also studied.
youdao