Learning how to think critically, do research and improve writing skills, are all preparing for a rigorous high school curriculum.

学习如何批判性地思考、做研究和提高写作技能，所有这些都是为严格的高中课程做准备。

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Palin has also embarked on a rigorous schedule of campaigning for Republican candidates for this year's midterm congressional elections in November.

VOA: standard.2010.02.09

I'd like to introduce now two very dear friends and supporters of positive psychology who are doing arguably more than anyone else to disseminate the ideas of positive psychology in a rigorous and fun way.

现在我想介绍两位挚友,积极心理学的支持者,可能比任何人,更致力推广积极心理学,以严谨和有趣的方式。

哈佛公开课 - 幸福课课程节选

It's a pretty state of affairs, in his view, when the most rigorous thinking that's being done about literature is being done in popular journals.

他认为，关于文学的严肃的思考大多,被发表在流行杂志上很不妥当。

耶鲁公开课 - 文学理论导论课程节选

To date, there has been scarcely any opportunity for a rigorous review of the rolls.

CENTERFORSECURITYPOLICY: Freedom Flame 2013

That she did so amid a rigorous stretch of training showed her mental fortitude, Kersee said.

WSJ: Allyson Felix's Olympic Hedge

The use of spot urine samples with such small group sizes is not a rigorous approach.

FORBES: Natural Resources Defense Council (NRDC) Champions Shoddy Journalism on Endocrine Active Chemicals