To most parents, longer hours in school would mean that the children are being kept busy, studying or playing under the teacher supervision.

对大多数的父母来说，在学校里呆的时间越长，就意味着孩子们在老师的监管下一直在学习或玩耍。

youdao

The children played under the watchful eye of their teacher.

孩子们在老师的看护下玩耍。

《牛津词典》

He wants to improve his spoken English under the guidance of a British teacher.

他想在一位英国老师的指导下提高他的英语口语。

youdao

It was my teacher. I held her with all my strength then shook with joy to feel the solid earth under my feet."

VOA: special.2009.11.15

At the age of 17, he studied land surveying and geometry under the parochial teacher Hugh Rodger, a man regarded as a great land surveyor and geometrician.

BBC: Robert Burns honoured for work as land surveyor

Conservative AM Angela Burns raised the issues of teacher under-performance, low level disruptive behaviour and the importance of making better use of the outdoor environment.

BBC: Debate on the ESTYN report

The teenager - known only as Pupil L - worked under the supervision of a retired teacher and was allowed no contact with other children and break and mealtimes, the House of Lords heard on Monday.

BBC: Violent pupil 'taught in isolation'