7、container罐头Canning, process of preservingfoodbyheatingandsealingitinairtightcontainers.Theprocesswasinvented(1809)byNicolasAppert,aFrenchconfectioner.IntheAppertprocess,thefoodwascookedinopenkettlesandplacedinglassjars,whichweresealedbycorkswiredinplace.Thejarswer