The application of situational English teaching film has its theoretical background, and its production includes compiling draft, writing scripts, filming, post-editing, assessment and revision, etc.
情境英语教学片的应用具有理论背景，其制作包括编稿、写脚本、拍摄、后期剪辑、评审修改等。
2
Theoretical analysis and experimental works have been carried out to study the solid particle attrition phenomena in a spouted-fluidized bed with a draft tube.