YOU SAID:
my brother has not had a growth spurt
INTO JAPANESE
私の兄弟は成長の急増を経験していません
BACK INTO ENGLISH
My brother has not experienced a surge in growth
INTO JAPANESE
私の兄弟は成長の急増を経験していません
BACK INTO ENGLISH
My brother has not experienced a surge in growth
That didn't even make that much sense in English.