great circle

circle drawn round a sphere in such a way that one of its diameters passes through the centre of the sphere 大圆（球体被通过球心的直径所截得的圆）.

gravitational, gravity, gravy, gravy train, gravy-boat, gray, grayscale, graze, grazier, grazing, grazing land, grease, grease-gun, grease-paint, grease-proof paper, greasily, greasiness, greasy, great, Great Britain, greatcoat, greater, Greater London, greatly, greatness, greaves, grebe, Grecian, Greece, greed, greedily, greediness, greedy, Greek, green, green belt, green fingers, Green Paper, green pound, green salad,