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来源：雅诚德英语网
This sleek design allows single sounds to convey useful information, and in fact, even the absence of a sound has been enlisted to express something specific.
这种圆滑的设计使单一的声音也能传达有用的信息，事实上，即使没有声音也会被用来表达一些特定的含义。
This sleek design allows single sounds to convey useful information, and in fact, even the absence of a sound has been enlisted to express something specific.
这种圆滑的设计使单一的声音也能传达有用的信息，事实上，即使没有声音也会被用来表达一些特定的含义。