Các nhà khoa học phát hiện ra công thức làm kem tan chậm
Hình ảnh những que kem tan chảy, nhoe nhoét khắp tay sẽ sớm trở thành quá khứ vì các nhà khoa học Anh đã tìm ra một hợp chất vô hại giúp kem chậm tan chảy.
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