馒头变质英语怎么说

馒头变质的英文表达是"stale steamed bun"。"Stale"指变质、过时的，而"steamed bun"则是指馒头。
这个表达来源于英语中对食物状态的描述，通常用于描述面包、馒头等烘焙食品变质后的状态。
例句1: "The steamed buns in the basket were stale and inedible."（篮子里的馒头变质了，不能食用）
例句2: "I only like to eat freshly made steamed buns, not the stale ones."（我只喜欢吃新鲜出炉的馒头，不喜欢变质的）