Part of the problem is that almost two decades after Amazon filed the one-click patent, the online retail shopping and buying experience is filled with frictions.
2019年6月六级真题（第一套）阅读 Section B
柯林斯高阶英汉双解学习词典释义
N-UNCOUNT
矛盾;不和;争执
If there is friction between people, there is disagreement and argument between them.