As obscure as the middle class definition is, it is most fascinating to me how we Americans expend so much energy trying to maintain the appearance of wealth.

中产阶级的定义是这么模糊，最令我好奇的是我们美国人怎样耗费如此多的精力努力维持富裕的表象。

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Does identical appearance maintain the company brand?

相同的外观能更好地维护公司的品牌形象吗？

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Higher level architects might see their deeper technical skills soften, yet are still expected (or perhaps simply try to) maintain the appearance of being deep technically.

较高级别的架构师可能看到自己深奥的技术技能逐渐削弱，但仍然希望(或者可能只是试图)维持技术专家的身份。

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Most conventional lawn grasses need 30 to 40 mowings a year to maintain their manicured appearance.

NPR: Excerpt: 'The American Meadow Garden'

Conservation will then be ongoing, with regular rewaxing in an effort to maintain the sculpture's improved appearance.

BBC: Henry Moore's House of Lords artwork restoration begins

Chairman and CEO Michael Sweeney said in a statement that part of the company's decision to sell its stake in the building came from the significant investment needed to maintain the building's infrastructure and appearance.

WSJ: Steinway selling its stake in flagship NY building