求翻译：称取一定量薏苡仁淀粉，放入250mL三口烧瓶中，加入一定数量的去离子水，在沸水中水浴20min，使淀粉充分糊化，降温，调节pH，加入普鲁兰酶作用一定时间后，是什么意思？

A certain amount Yiyiren starch, into the 250mL flask, adding a certain amount of deionized water, in boiling water bath for 20min, fully gelatinized starch, cool, adjust pH, 加入普鲁兰 enzyme after a certain time,

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The name takes the ration Job's-tears starch, puts in the 250mL three flasks, joins certain quantity the deionized water, in the boiling water water bath 20min, causes the starch full dextrinize, the temperature decrease, adjusts pH, after joins Prew blue enzyme action certain time,

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Call and pick up the Job's tears core starch of a certain amount, put into 250mL three port flask, add certain amounts of deionized water, water bath 20min in the boiling water, makes the starch fully pasted and melted, lower the temperature, regulate pH, after joining certain time of general stupid