It is not easy for a firm to play both the primary and the secondary market.

在一二级市场上同时如鱼得水，对于一家公司并不是易事。

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The ignition system is divided into two circuits: the primary and the secondary.

点火系统分为两条回路：初级和次级。

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Inversely, the performance can be estimated for both the primary and the secondary motors in that state.

或反之对于不同的副频可得系统主、辅电机在该状态下性能估计。

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In 2009,Sierra Leone President Ernest Bai Koroma launched a review of the education system following abysmal exam results at both the primary and secondary level.

VOA: standard.2010.02.25

This is an unfortunate thing you see throughout education frankly, certainly at the secondary and primary school level where you just insert technology into the classroom and expect to solve problems, that is not in life always the case.

遗憾的是,中小学教育中,就是讲知识然后运用所学的知识解决问题,但是实际生活中不总是这样。

哈佛公开课 - 计算机科学课程节选

One of the things that I didn't mention before is that when you get this primary response and then the secondary response, if you looked at the antibodies that are generated during the primary response, again we're only looking at antibodies that bind to the particular antigen or vaccine that we have used for the priming.

还有一点我之前没有提及,当你获得初次免疫,以及再次免疫之后,如果你仔细观察抗体,观察那些在初次免疫中生成的抗体,这次我们同样只是观察抗体,那些与我们在初次免疫中所用到的,特定抗原或疫苗相结合的抗体

耶鲁公开课 - 生物医学工程探索课程节选

The government schools reaching into city and rural areas and the missionary schools had been the backbone of primary and secondary education, but in recent decades a mushrooming of private schools, especially in the urban areas, has drastically changed the scenario.

FORBES: From Vedas To Cloud: The Transformation Of Education In India

The announcements on abandoning the new qualifications come alongside the publication of changes to the curriculum for primary and secondary schools.

BBC: Planned switch from GCSEs to Baccalaureate in England 'abandoned' - BBC News

After declining during the 1970s and early 1980s as the last of the baby boomers worked their way through the educational system, total primary and secondary school enrollment in public and private schools in the United States grew steadily during the late 1980s and 1990s, reaching an all-time high of 52.7 million in 1998.

UNESCO: II Part Analytic Section