但是，当最具影响力的网络用户出售他们想要收费的服务时，可以预料这一切都会改变，而安全将成为首要问题。

But expect it all to change, and security to become the number one issue, when the most influential inhabitants of the Net are selling services they want to be paid for.

youdao

和Nirvanix就提供这样没有其它收费的服务。

And Nirvanix offer this service at no extra charge.

youdao

而运营商唯一要考虑的就是怎样才能经营好像自选影片这样额外收费的服务。

The operator gets involved only in delivering the premium services, such as video-on-demand.

youdao

This particular website has this free nutrient analysis On the website people may choose to get involved in and there may be charges for those things, I don't really know, but there may be and then they may ask you for identifying information, but it's your option to do that.

网站的营养分析服务,在该网站,人们可以选择使用其他服务,当然,那些可能是收费的,我不是很确定,可能有收费服务,并要求验证个人信息,但这由你自己选择

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选