如果想保证上网安全，必须对以下这三种威胁同时设防。

If want to assure online safety, must be opposite the following these 3 kinds of menace at the same time fortify.

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在第三种情况下，几乎没有其他选择，但毫无困难地转换的能力造成了一种威胁，企业可以利用这种威胁与现有供应商谈判让步。

In Type 3 situations, there are few alternatives, but the ability to switch without difficulty creates a threat that companies can use to negotiate concessions from existing suppliers.

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对于移动设备的物理威胁主要有三种类型：借出、丢失和盗窃。

There are three basic types of physical threats to mobile devices: Lending, loss, and theft.

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