尊敬的参与者，现在请您回顾刚才观看视频进行在线学习时的真实体验，回答以下问题。
请注意，回答问题并不是根据您此刻的感受，也不是您平时的综合感受。
请根据您观看视频时最直接、最真实的体验作答。这对我们得出准确的研究结论帮助极大。您的所有资料将继续受到严格的保密处理。
The content of this video was very complex.
The topics covered in this video were very complex.
本视频讲解的主题非常复杂。
In this video, very complex terms were mentioned.
本视频提到了非常复杂的术语。
I invested a very high level of mental effort in dealing with the complexity of this video.
我投入了很高的脑力努力来学习视频中复杂的内容。
The explanations and instructions in this video were very unclear.
本视频中的讲解、说明方式非常不清楚。
The explanations and instructions in this video were full of unclear language.
本视频中的讲解、说明语言非常不清楚。
The explanations and instructions in this video were, in terms of learning, very ineffective.
本视频中的讲解、说明对学习来说非常无效。
I invested a very high level of mental effort in dealing with the unclear and ineffective explanations and instructions in this video.
我投入了很高的脑力努力来应对本视频中不清楚且无效的讲解、说明。
This video really enhanced my overall understanding of the content that was covered.
本视频确实增强了我对所讲解内容的整体理解。
This video really enhanced my understanding of the key ideas presented in the video.
本视频确实增强了我对所呈现核心要点的理解。
This video really enhanced my knowledge of the terms that were mentioned
本视频确实增强了我对视频提及术语的了解。
This video really enhanced my ability to apply the content I have learned in this video.
本视频确实增强了我应用在本视频中所学内容的能力。
I invested a very high level of mental effort during watching this video in enhancing my knowledge and understanding.
在观看本视频的过程中，为了增强知识和理解，我投入了很高的脑力努力。