For some time cosmologists have used sound as a diagnostic tool.
宇宙学家将声音用于诊断工具已经有些时日了。
Sound is a tool, by means of which people communcate with each other.
声音是工具，人们通过这个工具进行交流。
Sound is a tool, by means of which people communicate with each other.
声音是工具，人们通过这个工具进行交流。
The cutting sound signal in audible range includes a plenty of tool-wear information.
可听阈内的切削声信号包含着丰富的刀具磨损信息。
The cutting sound signal in audible range includes a plenty of tool-wear information.
可听阈内的切削声信号包含着丰富的刀具磨损信息。
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