| 《超越概念:听力(第4册)》：高等院校英语专业系列教材。 |
| unit 1 learning a foreign language unit 2 pop music unit 3 higher education unit 4 economy unit 5 war and conflicts unit 6 politics unit 7 digital technology unit 8 energy crisis unit 9 natural disasters unit 10 environmental protection unit 11 internet and other addictions unit 12 colorful cultures unit 13 discoveries unit 14 arts and literature unit 15 social interactions |
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