Complex sentence: According to Cantonese cuisine, seafood has a repugnant odour so strong spices are added; the freshest seafood is odourless and, in Cantonese culinary arts, is best cooked by steaming.
Split into simpler sentences: According to Cantonese cuisine, seafood has a repugnant odour so strong spices are added. The freshest seafood is odourless and, in Cantonese culinary arts, is best cooked by steaming.