Results obtained show that reversal procedure of diagonal branch contains two stages, one is stratified flow of smoke and airflow toward different directions, which is a quantitative change stage.
实验结果表明：下行通风角联分支风流的逆转可以归结为烟流和风流异向分层流动的量变过程和风向突变的质变过程。
This paper mainly describes how teaching serves for the test and introduces the reversal training procedure we ve used.
文章阐述了普通话教学如何为测试服务的问题，并详细介绍了逆序训练法。
This paper mainly describes how teaching serves for the test and introduces the reversal training procedure we ve used.
文章阐述了普通话教学如何为测试服务的问题，并详细介绍了逆序训练法。
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