The Helmholtz integral formula shows that the acoustic pressure in an enclosed space can be treated as superimpose result of contribution of all boundary elements that act as sound sources.是什么意思_The Helmholtz integral formula shows that the acoustic pressure in an enclosed space can be treated as superimpose result of contribution of all boundary elements that act as sound sources.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句