be wary of 提防;担心
be concerned about 担心;挂念
vulnerable adj. 易受攻击的;易受伤害的
Statistics show that online predation is rare — a Harvard study sponsored by attorneys general in all 50 states found that being online "increases the availability of harmful, problematic and illegal content but does not always increase minors’ exposure." It said kids most at risk are those who "often engage in risky behaviors" and have difficulties in other parts of their lives.
sponsor v. 赞助;发起 n. 赞助者;主办者;保证人
attorney n. 律师;代理人
"The whole ’stranger danger’ thing was very much driven by parental alarm," says Barbara-Jane Paris, principal of Canyon Vista Middle School in Austin, who testified before Congress in 2010 on cyberbullying.
The challenge, she and others say, is teaching kids that what they say and do online can have immediate, profound consequences — and that an offhand cruelty or indiscretion can last forever.
profound adj. 深厚的;意义深远的
offhand adj. 随便的;即时的
indiscretion n. 轻率;行为失检
"You can’t indefinitely call somebody a (slur for gays) and then just say, when called to the table, ’I was only kidding,’ " Paris says.
Question time:
1. How to be better "digital citizens" according to Principal Chris Lehmann of Philadelphia’s Science Leadership Academy?
2. How many teenagers go onlie at school?
1. To be careful what we say on the Internet.
2. 75%.