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relating to human society at a very early stage of development, with people living in a simple way without machines or a writing system
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very simple and old-fashioned, especially when sth is also not convenient and comfortable 简陋的；落后的；发展水平低的
relating to human society at a very early stage of development, with people living in a simple way without machines or a writing system
very simple and old-fashioned, especially when sth is also not convenient and comfortable 简陋的；落后的；发展水平低的