讲到胡同口“上”，而教他拉到胡同口“里”，没那个事！
If they told him the "mouth" of some alley and then expected him to pull them "into" it, nothing doing!
与之相反的就是你头脑中的消息，指的是你已经学会或者记住的知识，比如胡同口的近道是在任何地图上没有标出的消息。
Opposing this is information in your head, which refers to knowledge that you have learned or memorized, like the back-alley shortcut that isn't printed on any map.
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