Since it is very hard to determine the direction of bass frequencies, the placement of the woofer is not that critical as for instance the placement of front loudspeakers.是什么意思_Since it is very hard to determine the direction of bass frequencies, the placement of the woofer is not that critical as for instance the placement of front loudspeakers.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句