Her father was an old unmarried professor of mathematics, a brutal man and a braggart, who went out to give lessons in spite of his age.
她的父亲是个性情粗暴、爱吹牛的老数学教师，从没正式结过婚，虽然上了年纪，却还靠替人补课度日。
Children in the early grades learn mathematics more effectively when they use physical objects in their lessons.
如果课上可以使用有形的物体，低年级的学生会更有效地学习数学。
Yao took lessons in mathematics, English and modern Chinese history on the first day at university.
姚明上了数学、英语和中国近现代史等课程。
Yao took lessons in mathematics, English and modern Chinese history on the first day at university.
姚明上了数学、英语和中国近现代史等课程。
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