1.
if two people are hand in hand , they are holding each other's hand
2.
if two things go hand in hand , they are closely connected and one thing causes the other :
Poverty and poor health often go hand in hand.
1.
if two people are hand in hand , they are holding each other's hand
2.
if two things go hand in hand , they are closely connected and one thing causes the other :
Poverty and poor health often go hand in hand.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005