The backward area has achieved self-sufficient in grain. 这个落后的地区在粮食方面已能自给。

　　A good teacher must be an example in study. 一个好的教师必须是学习的模范。

　　方式：

　　例：All the speeches were taken down in shorthand. 所有报告都用速记记录下来了。

　　The Par