In Sierra Leone, English is used as the medium of instruction for all primary education.

在塞拉利昂，所有基础教育都用英语授课。

《柯林斯英汉双解大词典》

English is not the usual medium of instruction in our school.

英语不是我校通常使用的教学语言。

youdao

Chinese at a higher level than other schools and with greater cultural content, but the main medium of instruction is English.

校内所教的华文，程度会比较高，文化成分也比较多，但主要的教学媒介还是英语。

youdao

The medium of instruction being in Czech for most courses (certain courses are conducted in English), the beneficiaries of these fellowships are required to pursue a one-year preparatory Czech language course.

UNESCO: MEDIA SERVICES