He'd left school for a couple of years.

他离开学校有些年了。

麻省理工公开课 - 固态化学导论课程节选

And that's because I've left her to do it and to the school rather than me interfering.

那是因为我让她自己去做，去上学，而不是我干涉的。

学习靠自觉 - SpeakingMax英语口语达人

Just as in grade school when you're doing division and multiplication, you do it from left to right in terms of order of operations.

正像是在小学你做除法和乘法的时候,你毫不含糊地从左到右,按顺序做运算。

哈佛公开课 - 计算机科学课程节选

Right after i left Princeton, i went immediately to medical school.

从普林斯顿一毕业，我就进入了医学院。

普林斯顿公开课 - 领导能力简介课程节选

3% of black school children in fourth grade are left behind proficiency levels.

做了评估，其中，在四年级的黑人孩子里,63%阅读能力较差，58%的西班牙孩子。

麻省理工公开课 - 媒体、教育、市场课程节选