Leonard Green and Joel Myerson, psychologists at Washington University in St. Louis, found the generosity of a tipper may be limited by their bill.
圣路易斯华盛顿大学的心理学家莱昂纳德和乔尔·迈尔森发现，给小费者人是否慷慨可能会受到帐单金额的影响。
Their generosity is putting an additional burden on their limited resources.
而他们的慷慨也成为有限资源的额外负担。
Their generosity is putting an additional burden on their limited resources.
而他们的慷慨也成为有限资源的额外负担。
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