求翻译：not yet come up with a cell phone that is completely "hands free" several companies have recently developed components that是什么意思？

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not yet come up with a cell phone that is completely "hands free" several companies have recently developed components that

问题补充：

匿名	2013-05-23 12:21:38

匿名	2013-05-23 12:23:18

匿名	2013-05-23 12:24:58

匿名	2013-05-23 12:26:38

匿名	2013-05-23 12:28:18

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