资料来源：
https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.thespruceeats.com%2Fwhat-is-ice-cream-1328784&psig=AOvVaw3j-i_gEnFby0sb2VpflECp&ust=1694138821030000&source=images&cd=vfe&opi=89978449&ved=0CA4QjRxqFwoTCJCP3Ie1l4EDFQAAAAAdAAAAABAD
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