Stayed on for one year as an instructor after Ph. D. (math.) in 1950.
1950年在获得数学博士学位之后留校一年，担任讲师。
I had a difficult time (in) learning math last year.
去年我学数学很艰难、吃力。
The last day of the entire school year, all I have left is my math exam and I would be home free for summer.
这是整个学年的最后一天。完成今天的数学考试，暑假就要开始了。
At the end of the year I was asked to teach junior high math.
那年年底，我被安排去教初中数学。
The math problem is so easy that a three-year-old kid can solve it.
这道数学题太简单了，三岁小孩子都能做出来。
He is now applying to transfer to a 4-year college to pursuit a Math degree.
他现在正在申请转为四年制学习以便获取数学学位。
Miss Liu instructed a class in math last year.
刘老师去年给一个班学生上数学课。
Miss Liu instructed a class in math last year.
刘老师去年给一个班学生上数学课。
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