YOU SAID:

my hair can grow very long, yet it is made of a material that I do not attain the knowledge of

INTO JAPANESE

私の髪は非常に長く成長することができますが、それは私が知識を得ていない物質でできています

BACK INTO ENGLISH

My hair can grow very long, but it is made of substances that I have not gained knowledge

INTO JAPANESE

私の髪は非常に長く成長することができますが、それは私が知識を得ていない物質でできています

BACK INTO ENGLISH

My hair can grow very long, but it is made of substances that I have not gained knowledge