Faced with traffic noise and other human-made din, city birds have taken matters into their own hands: They adjust their songs in real time to make themselves heard.
面对着城市的交通噪音和喧闹嘈杂，为了让自己的歌声被听到，鸟儿也有自己的看家本领：实时调整歌声。
Only when people first adjust and cultivate themselves quietly, can they manage the affairs in the world with clear mind.
人们只有首先治理调摄自身，静静地养生，随后才能神志清明地治理天下事物。
The bristle assemblies are able to adjust themselves to moving equilibrium, can start up very quickly and run under smaller load and with less oscillation and noise than a drum.
针轮能够自我调节动平衡、启动快、负荷小，振动、噪声也比转鼓过滤离心机低。
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