Transforms can be stateless or stateful. A stateless transform is just a function that takes chunks and returns transformed chunks:
当时称重为 36 斤，宰杀及标记过程均由消费者现场确认。然而，当天晚间取餐时，王女士认为烤制后的羊体积明显偏小，经现场复称仅为 6.9 斤（不含羊头、羊血、羊蹄、羊皮、羊内脏等），遂报警处理。
。搜狗输入法下载对此有专业解读
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In 1874, Fanny Angelina married physician and bacteriologist Walther Hesse, an investigator of air quality and, specifically, air-borne microbes. In the Winter of 1880-81, Hesse became a research student with Koch in Berlin and experienced firsthand the difficulty of growing microbes on gelatine and the other growth media used at the time.