英语问题(菜鸟勿进)
fully76percentofJapan's119millioncitizensliveincitieswherecommunityandtheextendedfamilyhavebeenabandonedinfavorofisolated,two-generationhouseholds.中的“isolated,two-generationhouseholds.”逗号前后是什么关系?并列还是补充,或者说是都不是
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