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RE: 带孩子做科学实验系列之: 用洗涤灵驱动的小船 (Soap powered boat)
@aafeng got you a $7.57 (4.0%) @minnowbooster upgoat, nice! (Image: pixabay.com)
@aafeng got you a $7.57 (4.0%) @minnowbooster upgoat, nice! (Image: pixabay.com)