单词：asynchronous 

形容词

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  [1.a.asynchronous] (同义词:[asynchronous( adj. 不同时的,[电]异步的 )]  )
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  注释列句：(digital communication) pertaining to a transmission technique that does not require a common clock between the communicating devices; timing signals are derived from special characters in the data stream itself
• 反义词 -> [synchronous( adj. 同时的, [物]同步的 )] 
  
• 
  [2.a.asynchronous] (同义词:[asynchronous( adj. 不同时的,[电]异步的 )]  )
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  注释列句：not synchronous; not occurring or existing at the same time or having the same period or phase
• 近义词 -> [allochronic]  [anachronic( adj. 时代错误的, 年代误植的, 落伍过时的 )]  [nonsynchronous( 非同步的 )]  [serial( adj. 连续的 )] 
  反义词 -> [synchronous( adj. 同时的, [物]同步的 )]