Complex sentence: When the appliance is switched on, the blades continuously move lengthways to provide the sawing action.in the UK electric knives were popular in the 1970's and not as popular in today's kitchens.
Split into simpler sentences: When the appliance is switched on, the blades continuously move lengthways to provide the sawing action. In the UK, electric knives were popular in the 1970's and not as popular in today's kitchens.