单词:bronchial submucosa
支气管黏膜下层
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unit 568 医治感染 dialogue 英语情景对话 A:I have the chills and an upset stomach. A:我直打冷颤,胃也痛。 B:How long have you felt like this? B:这种症状多久了? A:For most of the week. A:差不多一周了。 对抗感染 B
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Voice is generated by a complex and beautiful biological system, and this is a system that allows all of us to communicate messages, concepts, and emotions. 声音是由负责、美丽的器官系统产生的,该系统可以让我们交流信息、想
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