This article indicates the importance of the theory, analyzes the main parts, the key parts and difficulties of learning Relations Database's theory, and gives some Suggestions for teaching it.
为此，在指出关系数据库理论的重要性的基础上，对关系数据库理论的主要内容、重点、难点进行了分析，并提出一些教学改革的建议。
How to overcome the negative transfer of dialect phonetics to the English pronunciation and intonation is the importance and difficulties in teaching and learning phonetics.
如何克服方言语音语调对学习英语语音语调的负迁移作用是我们语音教学的重点和难点。
Along with an upsurge in the body-building for the whole people, more and more people are aware of the importance of sports, which increases difficulties in sports teaching.
随着全民健身运动的兴起越来越多的人认识到体育运动的重要性，这就给体育教学加大了难度。
Along with an upsurge in the body-building for the whole people, more and more people are aware of the importance of sports, which increases difficulties in sports teaching.
随着全民健身运动的兴起越来越多的人认识到体育运动的重要性，这就给体育教学加大了难度。
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