求翻译：称取40g绿豆对照组原淀粉于烧杯中，加入pH=4的盐酸溶液至过量（水分≥80%），不断搅拌，用保鲜膜密封，放入50℃水浴锅中加热24h。停止加热后，用蒸馏水洗涤，离心（3000rpm，20min）2-3次，将沉淀物转移至平皿中，于40℃烘箱中干燥。将干燥的绿豆淀粉粉碎，过100目筛，得到酸结合热处理改性绿豆淀粉样品。是什么意思？

40g intake control group raw starch of mung bean in the beaker, join pH=4 to excess hydrochloric (water content ≥ 80%), constantly mixing, film seal, in 50 ° c in a water bath heated 24h. When the heating is stopped, use distilled water washing, centrifugal (3000rpm,20min) 2-3, to transfer deposits to flat dish, at 40 ° c in the oven drying. Dry crushing of mung bean starch, 100 mesh sieve, get mung bean starch modified by acid combined with heat treatment samples.