你要了解你所使用的博客程序如何使用，知道你所处的“博客世界”是怎样的。
Understand the features of the software you use and how the blogging community (the 'blogosphere') works.
借记卡相对来说安全一点（只要你的个人专用密码只有你自己知道），但是如果旅游地没有你所使用借记卡的自动取款机，那你就要用别的银行的取款机取款，那意味着你需要支付跨行取款费用。
Debit cards are relatively safe to use (as long as you keep your PIN private), but if you can't find one of your bank's ATMs, you'll have to pay for the privilege of using another bank's cash machine.
绘出数据流图，明白地知道数据如何被使用、被哪些人使用，以便你能评估所面临的风险，并决定如何处理它们？
Diagram the flow of data to be aware how data is consumed and by who, so that you can evaluate the risks involved and determine how to deal with them.
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