Now focus on the last two transaction bars.

下面重点注意最后两个事务栏。

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The transaction security problem of researching ec is the focus of the paper.

本文主要研究电子商务的交易安全问题。

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The transaction security problem of researching ec is the focus of the paper.

本文主要研究电子商务的交易安全问题。

youdao