By registering his passage, the captain of a commercial vessel can trade information about pirate activity with naval patrols.
货船的船长可以通过登记其航线与海军巡航对换取海盗的活动信息。
E-commerce mean carry on commercial activity, communication of business and person who punish of trade at network through computer.
电子商务是指通过计算机在网络上进行业务通信和交易处理等商务活动。
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