2 "The shortest distance between two points is a straight line." -famous mathematical sayings (of course, provided that they are in the same plane)
3 "If no railway has conquered the distance, my child will never leave his hometown, and I don't need a telephone to hear his voice; If I can't cross the ocean by boat, my friend won't embark on a voyage, and I don't need a telegram to relieve my worries about him. " -Freud's Civilization and Its Shortcomings
4 The furthest distance in the world is (we sit together, you play tablet computer, I play smart phone) ... The content in brackets can be adapted in a similar format, which will be more humorous.
5 An object with uniform acceleration chases an object with uniform motion, and when their speeds are equal, the distance is the farthest; An object moving at a uniform deceleration chases an object moving at a uniform speed. When the speed of the two objects is equal, the distance is the shortest. If it has not caught up at this time, it will not catch up. -"Theorem" of physics exercises in senior high school.
6 "A friendship between gentlemen is as light as water", an idiom in China, also expresses the distance between people.