on the mountains意思是：“在山上” in the mountains意思是：“在山里/山间” 又如： Long long ago,there were many trees on the mountains. We went hiking in the mountains on Saturday. 如果我的回答对你有所帮助,请点击本页面中的“选为满意回答”按钮,
on the mountains意思是：“在山上” in the mountains意思是：“在山里/山间” 又如： Long long ago, there were many trees on the mountains. We went hiking in the mountains on Saturday.
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