DesdemonaHouse942

出典: くみこみックス

A clock is a power tool used to show, keep, and co-ordinate time world clock. The clockis derived ultimately (via Dutch, Northern French, and Medieval Latin) from the Celtic words clagan and clocca meaning "bell". A silent tool missing such a mechanism has traditionally been known as a timepiece at world clock map. In general usage today a "clock" refers to any device for measuring and displaying the world clock. Watches and other timepieces that can be carried on one's person are often distinguished from clocks.