Sometimes we are simply held back from helping others through lack of knowledge or even fear of stepping up.
有时,我们仅仅由于知识的匮乏、甚至是恐惧等因素,不得不收回援助之手。
Psychologists have long assumed that our misperception of slope was biased by fatigue or even fear of falling.
心理学家很早以前认为我们的坡度错觉是由于疲劳甚至害怕坠崖而带有倾向性。
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