Warning: file_put_contents(): Only 0 of 5258 bytes written, possibly out of free disk space in /www/wwwroot/ppbbu/52065.com/index.php on line 55 monochromatic approximation例句_monochromatic approximation英汉例句_monochromatic approximation双解例句_伍贰汉英词典
A satisfactory approximation to monochromatic light can be obtained with a filter placed in front of the arc . 在碳弧前面放一个滤光片就可以得到令人满意的近单色光。 www.translation-dictionary.net