Unit 1Other countries, other culturesPara 1minus prep. 减; 零下 Seven minus three equals four. The temperature today is minus ten degrees centigrade. 。plus prep 加One plus one equals two. Canada is one of the largest countries in the world, second only to Russia, and has always been famous for its fantastic natural scenery. second to 仅次于……Our city has an area of 20,000 square kilometers, second only to the..