Video shows what gem means. A precious stone, usually of substantial monetary value or prized for its beauty or shine.. any precious or ... ... <看更多>

It means "equal to or greater than in the last digit", so e.g. ~> 2.3 means "equal to 2.3 or greater than 2.3, but less than 3.0", while ~> 2.3.0 would mean ... ... <看更多>