打破欧元区的概念提出了至少三个问题：第一，为何有国家想离开？

The idea of breaking up the currency zone raises at least three questions. First, why would a country choose to leave?

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诺斯·鲁普和她的同事将根据调查的结果，解释当今人们生活中更普遍的现象，并且很有可能对“正常”的概念提出新的观点。

Northrup and her colleagues will also use the results to illuminate larger, more general trends about how we live today, very likely calling into question the very concept of "normal."

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太阳帆的概念提出要追溯到16世纪，德国天文学家Johannes Kepler(开普勒)首先提出利用太阳能驱动物体在星际旅行。

The concept of space sails dates back the 16th century, when German astronomer Johannes Kepler first came up with the idea of using the sun's energy to propel objects through space.

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In fact, he actually emphasized a concept that was first stated by a French philosopher Louis Blanc in the mid-nineteenth century.

事实上，他特别看重,一个由法国哲学家路易·勃朗,在十九世纪中期,率先提出的概念。

耶鲁公开课 - 金融市场课程节选

I asked my graduate student research assistant to research the whole literature and find out where did the word forward rate come from.

我让我的助研去查找,所有相关文献,试图找到,谁最先提出了远期利率的概念

耶鲁公开课 - 金融市场课程节选

One that was developed a number of years ago but has been perfected and refined in recent years with very, very good research.

该概念很多年前就已经提出了,但在近年通过高水平的研究才被改进完善

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选