为使流经缩放形喷管的低温热水得到充分膨胀和加速，在此对缩放形喷管的喉部及扩张段进行实验对比分析。
Experimental study for such was carried out on established test rig with flat, converging and converging diverging nozzles of different throat diameter, shape and diverging angle.
第二部分在对语言迁移现象进行充分调研的基础上，阐述了对比分析和错误分析等相关理论；
The second part elaborates the theories of contrastive analysis and error analysis in light of the current study of the language transfer.
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