请英语大神翻译一下这句话,谢谢~~
it is reasonable to suppose that while certain individuals perceive high risk in online shopping and will only be prepared to trust a certain web site if they perceive many signals from a firm and if they have had a satisfactory previous experience, other individuals who perceive less risk will require fewer signals from the firm or web site to trust, and previous satisfaction will play an important role.
除了翻译之外能再具体说一下那个signal是什么意思吗?谢谢~~