Generally Fried food enterprises, in the use of two or three days later, the frying oil has thickenedoil has black, acid value exceeds bid, have to be scrapped.
一般油炸食品企业，在使用煎炸油两三天后，油已变黑变稠，酸价超标，不得不废弃。
2
Cook the sauce in the remaining oil until thickened. Return oysters to the wok and toss well.
用剩馀油把芡汁煮滚至浓稠，把蚝只回镬，拌匀。
3
Over night the engine cooled to room temperature and the oilthickened.