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отстающий в развитии stresses
gen.	developmentally vulnerable (о детях tania_mouse)
account.	lagging
psychol.	backward (Andrey Truhachev)
отставать в развитии
gen.	be rather poorly developed
chess.term.	lag in development
med.	be retarded (maystay)

отстающий в развитии: 10 phrases in 4 subjects

Agriculture	2
Chess	2
General	2
Makarov	4