Warning: file_put_contents(/home/www/wwwroot/tjuzi.com/cache/cb3523c0f5365b246c29fb09b31c6dd9.txt): failed to open stream: No space left on device in /home/www/wwwroot/tjuzi.com/index.php on line 55 square wave英英字典_square wave剑桥英语解释_square wave柯林斯英文解释_橘子化妆朗文词典
1. N an oscillation, for example in voltage pulse, that alternates between two fixed values with a negligible transition time between the two, giving a rectangular waveform 方波