这些卡片通常有颜色密码显示。一看就知道某间房是单人间还是双人间，并且里面有什么设备。

The cards often have a color code that shows at a glance whether a particular room is a single or a double and what other facilities it offers.

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2015年的一项调查显示，超过9.5亿份记录没有受到保护，包括地址、电子邮件、出生日期、电话号码、密码等等。

A survey in 2015 showed that more than 950 million records were not protected, including addresses, emails, birth dates, phone numbers, passwords and so on.

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用户可以修改他们的个人设置，例如显示名和密码。

Users can change their personal Settings, such as display name and password.

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