Call it a magic cup
本文作者： Chen Yuanyuan, 21st Century Teens staff (Liu Haixu, from Hebei No 45 Middle School contributed to the story.)
中学生发明神奇的水杯，倒上热水就能充电。词数 268 建议阅读时间 7分钟What can you do if your cell phone runs out of power and you’re away from home? For Zhang Dichang, 14, of Hebei No 45 Middle School, it’s not a big problem. |  |
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