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it can be made cost-effectively． it can leave voice messages， it makes online shopping easy it makes fraud difficult．
it can be made cost-effectively. it can leave voice messages. it makes online shopping easy. it makes fraud difficult.
It recognizes only its owner’s spoken password． It doesn’t need to work with an online server It requires less ID information． It has a playback function
amounting covering returning paying
production possession purchase pursuit
establishments hotels shops supermarkets
Only female voice passwords could be recognized． Further improvement should be made to extend battery life There is no limit to its application． Female customers like to use it
It is too large． It is toot hick It can’t be used in online transactions It doesn’t have a loudspeaker．
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