Simply add the Userfly code to your site, and you'll soon be a fly-on-the-wall as users walk through your pages.
只要把一行userfly代码添加到你的网站里，你很快就可以跟踪用户访问网页的数据。
2
Use a fly-on-the-wall approach: Describe what happens as if you're a flyonthewall observing the events transpire.
应从旁观者的角度去描述：作为观察事件发生的旁观者描述发生了什么。
3
This week he appeared in a fly-on-the-wall television documentary to say that he had made up his mind as to whether to run... but would not reveal his decision until July.
本周他出现在《墙上飞翔》(fly - on - the - wall)[10]纪录片中，他说已经决定了怎么做……不过在七月之前他是不会说了。