翻译：人们网上购物时，要特别注意信用卡安全。（pay attention to)

People should pay speical attention to the security of credit card when shopping on the internet.

pay attention to safety of credit card，when buy something on the net.

你好！请参考：People on-line shopping, credit card to pay special attention to safety

When people on-line shopping, wants the special attention credit card security.

People should pay attention to the security of credit cards when shopping online.