rapid

significant leap forward

make a leap forward

growth; maturation

grow / grow up, become big

a career

(telecommunications) a carrier / (genetics, pathology) carrier / (physics, electronics) carrier

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend