1."They tend to produce noise in frequencies that are easily detectable by the human ear, " says J.
它们会产生某些噪音，这些噪音的频率易于被人耳感知。
2.Even normal jet engine airplanes produce noise pollution, but Concorde could do harm to people's ears.
即使普通的喷气式飞机也会产生噪音污染，但协和式的噪音飞机对人的耳朵有害。
3.The pump of aquatic animals box still can produce noise, influence Morpheus .
水族箱的气泵还会产生噪音，影响睡眠。
4.Because the principle of using air convection, no fans, so I do not produce noise, dust, pollution, even dull.
由于采用空气对流的原则，没有球迷，所以我不产生噪音，尘埃，污染，甚至乏味。
5.In addition, set off firecrackers to produce noise pollution.
此外，燃放鞭炮产生的噪音污染。
6.In addition, the new bus is veryquitequiet and does not produce noise pollution.
另外，这种新型汽车很安静，不会产生噪音污染。
7.Not all factories here produce noise.
这儿并不是所有的工厂都发出噪音。