资料来源：
https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.pbs.org%2Ffood%2Fthe-history-kitchen%2Fexplore-the-delicious-history-of-ice-cream%2F&psig=AOvVaw3i4Uzfs0TqOPG3Nl5YEw4J&ust=1693892711744000&source=images&cd=vfe&opi=89978449&ved=0CA4QjRxqFwoTCODb2Z6gkIEDFQAAAAAdAAAAABAI