水资源是人们最关注的地球环境问题之一。
《地球之歌》是第一首公开发布主题关于环境问题和动物处境的歌曲。
"Earth Song" was the first that overtly dealt with the environment and animal welfare.
《地球之歌》是第一首公开发布主题关于环境问题和动物处境的歌曲。
"Earth Song" was the first that overtly dealt with the environment and animal welfare.
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