So a tall chain-link fence keeps everyone away from it by about 50 meters.

VOA: standard.2010.02.17

And so ultimately one of the messages we'd like to send today is that if you are the type who's kind of on-the-fence don't think this is for you, worried about hurting your GPA or anything like that.

最终，我们想告诉你们的是,如果你是那种对分数不太在意的人,这种打分制就不是为你准备的，担心影响你的学分绩点之类的东西。

哈佛公开课 - 计算机科学课程节选

There were also complaints about a chain-link fence that surrounded the Olympic Cauldron.

VOA: standard.2010.02.21