Gemini program
— Noun
– English
～ a program of space flights undertaken by US in 1965 and 1966; "under the Gemini program each crew had two astronauts"
geometric progression
— Noun
– English
～ (mathematics) a progression in which each term is multiplied by a constant in order to obtain the next term; "1-4-16-64-256- is the start of a geometric progression"