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。
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.
本文对导向喷动流化床中固体颗粒的破损进行了理论分析和实验测试。
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