The study of congenital heart diseases has come a long way since their description and classification.

研究先天性心脏病已走过了漫长的道路，因为他们的描述和分类。

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Extracting effective features for texture description and classification is always a difficult problem in texture analysis.

提取有效的特征用于纹理描述和分类一直是纹理分析的难点。

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A considerable amount of strategy research has focused on the identification, description and classification of language learning strategies.

大量的策略研究集中于对策略的识别、描述和归类上。一般认为策略可分为学习策略和运用策略。

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