You’re trying to exercise willpower—to avoid eating that second piece of cake or buying an electronic toy you don’t really need.

假定你正在练习意志力，比如不去吃不该吃的蛋糕，不去买不需要的电子产品。

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Instead, they've found that a person's mindset and personal beliefs about willpower determine how long and how well they'll be able to work on a tough mental exercise.

相反，他们发现一个人的精神状态和个人对意志力的观点决定了他们在费力的脑力劳动方面工作时间的长久和效果的好坏。

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You're trying to exercise willpower-to avoid eating that second piece of cake or buying an electronic toy you don't really need. Try firming up your muscles.

假如你正在锻炼自控力——例如不吃第二块蛋糕，或者是不买不需要的电子玩具——那就尝试绷紧你的肌肉吧，任何肌肉都可以。

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