Historians suggest that the advent of mass tourism began in England during the industrial revolution with the rise of the middle class and the availability of relatively inexpensive transportation.

历史学家认为，大众旅游的出现始于工业革命时期的英国，当时中产阶级崛起，交通费用也变得相对便宜。

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During the past 15 years a new middle class has sprung up in emerging markets, producing a silent revolution in human affairs-a revolution of wealth-creation and new aspirations.

过去15年来，一个全新的中产阶层开始在新兴市场国家迅速成长起来，为人类事业上带来了一场无声的变革——关于财富创造和全新愿望的变革。

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Chapter One introduces briefly the process of the Industrial Revolution and social status of the middle class as well as its moral discourse.

第一章介绍工业化进程与维多利亚中产阶级社会主导地位的确立，同时分析中产阶级与维多利亚道德话语。

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Shadegg is a member of the vaunted "revolution" class of 1994, and has argued that he would renew the fervor of the Republican Revolution.

NPR: After the Election, New Races on Capitol Hill

The lower middle class of army officers and bureaucrats who rose in the revolution have joined the gentry they were supposed to have ousted, adopted their haughty ways and now share Egypt's spoils with them.

ECONOMIST: The long wait

But the Navy has many other options for generating savings in its budget, and the Ford class is a big improvement over carriers designed before the information revolution began.

FORBES: Despite Budget Woes, The Navy Is Unlikely To Cut Carriers