In a frying pan with oil, add in celery and onion. Stir-fry on medium heat till fragrant and soft. Add in red wine, stir fry a few seconds to evaporate the alcohol. Stir in plain flour, cook for 1 minute to thicken the sauce. Add in beef stock and bring it to a boil. Add carrots, mushrooms, thyme, oregano, garlic and Worcestershire sauce, bring to a boil. Lastly, add potatoes and the beef cubes to the pot. Bring to a boil. Transfer to the pressure cooker. (在有油的炒锅里, 倒入芹菜和洋葱。用中火,翻炒至到香味扑鼻,菜变得稍微软。倒入红葡萄酒,搅拌几秒钟以让酒精蒸发。倒入面粉,煮1分钟直到锅里的水分变稠。加入牛肉清汤,并将它煮沸。加入胡萝卜,蘑菇,百里香,牛至,大蒜和渥斯特夏酱,再次煮沸。最后,把马铃薯和牛肉块放到锅里。煮滚。)