社会性媒体能够带来巨大挑战的原因之一就是它通常会挑战等级制度，而等级制度的上层人物已经习惯了舒适的上层生活。
One of the reasons social media can be so challenging is that it often challenges hierarchies... and people at the top of those hierarchies have grown comfortable there.
现在所面临的挑战是从印刷材料到提供了新型互动等级的数字化的转变。
The challenge is making the shift from print-based materials to digital ones that offer new levels of interactivity.
符合技能挑战——提供可适应/可调整的界面，环境复杂度对用户技术等级的要求控制在用户能力范围内。
Match challenges to skills—Offer an adaptable/adjustable interface that givesusers control over their environment’s complexity that is appropriate to their skilllevel.
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