1987年7月参加工作，在中学、大专学院和大学担任过21年教师。

Have been working from July, 1987 and as a teacher in middle schools, colleges, and universities for 21 years.

youdao

1987年7月参加工作，在中学、大专学院和大学担任过21年教师。

Have been working from July, 1987 and as a teacher in middle schools, colleges, and universities for 21 years.

youdao