下次，当我们想在提供免费 WiFi 网络的公共场所使用笔记本电脑或智能手机时，请三思而后行或者在使用之前采取安全措施。
Next time, when we want to use our laptops or our smartphones in public places which offer free WiFi networks, please think it twice or take safe measures before using them.
试想一下，这种药制作简单，服用安全，且完全能免费获取。
Imagine that this drug were simple to make, safe to take, and could be had for free.
它们有安全的路线，特别是对于新手，它们还提供免费培训。
They have safe tracks, especially for the beginners and provide free training.
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