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KJV - Again, if two lie together, then they have heat: but how can one be warm alone?
ASV - Again, if two lie together, then they have warmth; but how can one be warm `alone'?
BBE - So again, if two are sleeping together they are warm, but how may one be warm by himself?
WEB - Again, if two lie together, then they have warmth; but how can one keep warm alone?
YLT - Also, if two lie down, then they have heat, but how hath one heat?