In ninth grade, I continued participating in science and technology innovation activities. I upgraded the electronic hardware of an eco-friendly washing machine, and this project later represented our school at a science and technology exhibition. The most significant activity that year was building a height-adjustable desk under my teacher’s guidance. Its tabletop could be adjusted to different heights as needed during use, and a specific area on the surface could wirelessly charge mobile phones. This project also earned me a patent certificate that year.
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