七: seven岁: year开始: begin; start; initiate; comm ...上学: go to school我六岁开始上学: i started school at the age of开始上学: begin school我从七岁开始参加演出,我没想过要停下来: i started acting when i was seven and i don't think i'll stop开始上轨道: get into one's stride开始上课: begin classes; classes begin开始上课啦: the lesson begains开始上升: initial climb开始上场队员: starting number它已开始上市: it has appeared on the market. city十五岁开始吃全素: went vegan at岁开始学习英语: anterior temporal在四十岁开始供款: start contributing in their 40s学校八点开始上课: classes begin at七岁: seven等孩子安静下来你再开始上课: wait until the children have settled down before you start your lesson上学: go to school; attend school; be at school 去上学 go to school; 这孩子上学了吗? is the child at school十七岁: at seventeen; seventeen初始上界解: initial upper bound solution起始上升: climb-out起始上升率: initial climb rate原始上皮: primary epithelium