He suspects that unreasonable expectations are an important reason about half of all people who start a running program drop out, usually in the first six weeks.
他怀疑，不切实际的期望是开始跑步计划的人中半数退出的一个重要原因，通常是在前六周。
He suspects that unreasonable expectations are an important reason about half of all people who start a running program drop out, usually in the first six weeks.
他怀疑，不切实际的期望是开始跑步计划的人中半数退出的一个重要原因，通常是在前六周。
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