你知道为什么我们上课上到一半时会感到困倦吗？
Do you know the reason why we feel tired in the middle of a class?
从我个人情况来讲，当我们进行到一半时，我已经忘记大部分人的姓名和工作。
Personally, by the time we're halfway through I've forgotten most of peoples names and jobs anyway.
我们发现，你说话的效率太高了，但有一半时间，大多数人会忽略他们不需要的信息，所以，你只是白费唇舌而已。
We realize you're being overly efficient, but half the time most people will tune out the information they don't need, so you're just wasting your breath.
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