In 18th- and 19th-century schools, slate was extensively used for blackboards and individual writing slates, for which slate or chalk pencils were used.
Slate was used for blackboards and writing tablets in schools.
Slate was used for blackboards and writing tablets in schools.
文章をもっと簡単に書き直してください: In 18th- and 19th-century schools, slate was extensively used for blackboards and individual writing slates, for which slate or chalk pencils were used. 出力: