He left school with no formal qualifications.

他离开学校没有获得正式学历。

《牛津词典》

It's difficult to estimate the number of youngsters involved in home schooling where children are not sent to school and receive their formal education from one or both parents.

很难估计有多少年轻人接受家庭教育，在家庭教育中孩子没有被送去学校，而是从父母一方或双方那里接受他们的正式教育。

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You would also use formal English in compositions and essays that you write in school.

你也会在写学校的作文和论文时使用正式的英语。

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Participants who pass this test are awarded high school graduation certificates by the Department of Education, which enable them to continue to higher education or seek formal employment at a similar level to formal school graduates.

UNESCO: Country Profile: Philippines

By the time formal school starts, at six or seven, it may be too late.

ECONOMIST: Europe's Romanies: Hot meals for hard cases | The

The programme aims to help Moroccan citizens more effectively engage with media and the Internet and to develop critical competencies in using information by placing Media and Information Literacy in the formal national school curricula.

UNESCO: MEDIA SERVICES