Warning: file_put_contents(): Only 0 of 5006 bytes written, possibly out of free disk space in /www/wwwroot/ppbbu/laei.cn/index.php on line 58 vertical directionality是什么意思，vertical directionality的翻译，vertical directionality音标、读音、用法和例句_按摩法牛津词典
Spectrum level and vertical directionality of the noise are two of major factors affecting the performance of underwater sound systems. 海洋環境噪聲的譜級及垂直指曏性是其中兩個影響水聲系統的主要因素。