inscrutability

In fact,inscrutability is about the most comfortable expression that a person can wear.

事实上，可思议大概是一个人可以表露最轻松表情。

Of course, this means that they exhibit the same problem as imperative butcons: the inscrutability of the icon.

当然这也意味着它们存在和命令型图标按钮一样，即图标费性。