Turns out, according to Daniel Cook, a historian of childhood consumerism, it was popularised as a marketing trick by clothing manufacturers in the 1930s.
据儿童消费史学家丹尼尔·库克所说，事实证明，这种做法是服装制造商在20世纪30年代为了促销而推广的一种营销手段。
In The Moral Consequences of Economic Growth, the economic historian Benjamin Friedman argues that both inside and outside the U.S., lengthy periods of economic stagnation or decline have almost always left society more mean-spirited and less inclusive, and have usually stopped or reversed the advance of rights and freedoms.
在《The Moral Consequences of Economic Growth》一书中，经济史学家Benjamin Friedman认为，无论是在美国国内还是国外，长期的经济停滞或衰退几乎总是使社会变得更加吝啬和更不包容，并且通常会阻碍或逆转权利和自由的进步。
As a historian who's always searching for the text or the image that makes us re-evaluate the past, I've become preoccupied with looking for photographs that show our Victorian ancestors smiling (what better way to shatter the image of 19th-century prudery?).
作为一名总是寻找能让我们重新审视过去的文本或图像的历史学家，我开始着迷于寻找那些展示我们维多利亚时代祖先微笑的照片（还有什么比这更能打破19世纪保守刻板的印象呢？）。
例句取自历年考研英语真题，翻译为机器生成，仅供学习参考。