根据昆虫学家的说法，单个的蝗虫是安静的生物，但是当它们和同类的其他蝗虫放在一起时，它们会变得兴奋，变色，振动，甚至嗡嗡叫。
According to entomologists, single locusts are quiet creatures, but when locusts are placed with others of their species, they become excited, change color, vibrate, and even hum.
他们还能够提供一个振动和噪音机器的安全，安静和一致的悬挂系统。
They are also able to provide a safe, quiet and consistent suspension system for vibrating and noisy machinery.
几乎是不可能的振动自由和非常安静。
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