He says many,if not all, of the top American colleges once had a core curriculum a set of courses required for all students.

VOA: special.2009.10.22

He has the most varied career and has been celebrated in so many different situations that we're honored that he's here on the Inner Core today.

他的职业生涯很丰富,可谓功成名就,我们很荣幸今天能请到他来到现场。

普林斯顿公开课 - 人性课程节选

So let's do a quick clicker question, and you tell me how many valence electrons does fluorine have? Remember, valence electrons are different from core, they're only the outer-most electrons in the outer-most shell.

那么让我们来做一个小选择题，请大家来告诉我,氟有多少个价电子，要记得，价电子与芯电子不同，它们是在最外壳层的最靠外面的电子。

麻省理工公开课 - 化学原理课程节选

She said there were many core issues excluded from the consultation, including care in the community and the manner in which it was to be delivered.

BBC: Health services: Hywel Dda watchdog wants more time to talk

We believe OMB can continue to deliver high-quality performance and fulfill our many important core responsibilities at this proposed staff level.

WHITEHOUSE: Testimony of Director Portman

Debt overhangs are now so large in many (core economies) that they are increasingly unlikely to be able to fix them by fiscal effort alone.

FORBES: Fed Policy, Easy Money, And The Sum Of All Fears