City sculpture, as a city's master concept of public art, is a complete system.

作为一个城市公共艺术的总体概念时，城市雕塑是一个完整的系统。

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To master concept, pathogenesis, pathologic changes and effects to body of infarct .

掌握梗死的概念、 发生机制、 病理变化及对机体的危害。

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To master concept, causes, pathologic changes, and effects to body of hyperemia and congestion.

掌握充血及淤血的概念，原因，病理变化及对机体的影响。

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Providing feedback to students, explaining why their answers were right or wrong, and then allowing students to continue to work on a problem until they have it right and master the concept produces statistically significant gains in student learning.

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This brief moment, which is quickly cast aside as Flash and Wonder Woman deal with Mirror Master, establishes an important concept: the old lines of good and evil are considerably murky, now.

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Yielding is another concept Ms. Bravo's tai chi master, Sat Hon, taught her, and it has proved helpful in negotiating the city.

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