他不会应试的，所以不要白费唇舌地试图劝他了。
He won't take the exam, so don't waste your breath trying to persuade him.
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.
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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