the period of instruction in a school; the time period when schools is in session
同义词：schoolschooltime
school day例句
School Day Children's pedometer-determined physical activity during the segmented school day How do school-day activity patterns differ with age and gender across adolescence? Trends in the duration of school-day sleep among 10- to 15-year-old South Australians between 1985 and 2004. Does lengthening the school day increase students’ academic achievement? Results from a natural experiment in Chile School day segmented physical activity patterns of high and low active children parents, friends and school support across a segmented school day Extending the School Day or School Year A Systematic Review of Research (1985–2009) Physical activity during the school day in public primary schools in Mexico City. Lack of short-wavelength light during the school day delays dim light melatonin onset (DLMO) in middle school students.
