One of the things we want to help you do is identify the different classes of algorithms, what their costs are, and how you can map problems into the most efficient class to do the computation.

我们想要教会你们的事情之一就是，学会辨别不同种类的算法，它们的代价是怎么样的，以及怎么样把问题映射到，最有效的算法种类中去做计算。

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No. 51 Senior High School is building a harmonious campus, shaping the charming teachers, realizing efficient class, nurturing excellent students and establishing a prestigious senior high school.

今天的五十一中学正在为构建和谐校园，塑造魅力教师，实现高效课堂，培养优质学生，创建精品名校而努力奋斗。

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The group discussion and the efficient class interaction could stimulate the learners' study motivation.

小组讨论和课堂互动激发人的学习动力。

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One of the things we want to help you do is identify the different classes of algorithms, what their costs are, and how you can map problems into the most efficient class to do the computation.

我们想要教会你们的事情之一就是,学会辨别不同种类的算法，它们的代价是怎么样的，以及怎么样把问题映射到,最有效的算法种类中去做计算。

麻省理工公开课 - 计算机科学及编程导论课程节选

The resulting competition from both domestic and international financial services companies is supposed to usher in a new era of efficient and world-class banks, insurers and securities dealers.

CNN: FLYING AGAINST THE OLD WAYS

In late 2007, France launched the first large-scale "feebate" (fees on inefficient cars, offsetting rebates to efficient models in the same size class).

CNN: Freeing America from its addiction to oil

But in response, a Royal Mail spokesman told the BBC that any suggestion that the second class post was more efficient than the first was "completely incorrect".

BBC: NEWS | Business | Use second class, says Postwatch