YOU SAID:

their hair was fully fair and took 7 weeks to grow

INTO JAPANESE

彼らの髪は完全に公正で、成長するのに7週間かかりました

BACK INTO ENGLISH

Their hair was perfectly fair and took 7 weeks to grow

INTO JAPANESE

彼らの髪は完全に公正で、成長するのに7週間かかりました

BACK INTO ENGLISH

Their hair was perfectly fair and took 7 weeks to grow