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蓝色LED

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A Light Emitting Diode (LED) is a tiny electronic light that makes a big difference. Discover its colors, history, everyday uses, safe kid-friendly demos, and stories for ages 3 to 12 on Storypie. 儿童科学

发光二极管 (LED)：小小光芒，大大创意

发光二极管 (LED) 是一种小型电子灯…

Jaikaran Sawhny

Jaikaran Sawhny

11 4 月, 2026 •
1 分钟阅读

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