名词
中文翻译：Unknown
同义词：
['self-powered device', 'self-powered instrument', 'self-powered tool']
例句：
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1. The self-powered recorder is perfect for recording lectures in a classroom setting.
这种自给自足的录音机非常适合在课堂环境中记录讲座。
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2.The self-powered recorder allows students to learn independently without the need for external power sources.
这种自给自足的录音机让学生能够独立学习，无需依赖外部电源。
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3. The self-powered recorder is an essential tool for teachers who want to create engaging and interactive lessons.
这种自给自足的录音机是教师制作有趣且互动性强的课程不可或缺的工具。