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Health experts advise that the average woman should consume about 2,000 calories a day and a man about 2,500 calories to maintain a healthy weight.

健康专家建议，为了保持健康的体重，女性平均每天应该摄入大约2000卡路里，男性每天应该摄入大约2500卡路里。

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Farmers lack enough inputs to maintain soil fertility is parts of many developing countries, especially in Africa south of the Sahara.

VOA: special.2009.07.28

He would remain a virgin in order to prepare for and to maintain this incredibly important role as an epic poet.

他想保持自己的童贞,为了准备和保持作为史诗诗人这个无比重要的角色。

耶鲁公开课 - 弥尔顿课程节选

You should acquire overtime this instinctive aversion to just code or programs that just look ugly because things that look ugly generally are not easy to maintain.

对于代码和程序你会有一种本能的讨厌,这是因为这些代码和程序看起来很丑陋,并且不容易维护。

哈佛公开课 - 计算机科学课程节选

PricewaterhouseCoopers periodically inspects the walls of protection Credit Suisse has created to maintain its competitive advantage.

FORBES: Watch Out For The Quants

Notes are redesigned on a relatively frequent basis, in order to maintain security and prevent forgeries.

BBC: Sir Winston Churchill to feature on new banknote

They had proved unpopular with head teachers, who protested they undermined efforts to maintain discipline in schools.

BBC: Expulsions rise for second year