Organic chemistry is an important specialized core course. It has an important part in the teaching of specialized course.

有机化学是一门重要的专业基础课，对专业课的教学有着直接的影响。

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Now, all Iraqi Army recruits receive about the same length of basic training as new recruits in the U.S. Army a five-week core course, followed by an additional three-to-seven weeks of specialized training.

NPR: Bush Reaffirms Iraq Strategy