backglasses造句

• During the 1930s and the 1940s, lights mounted behind the painted backglasses were used for scoring purposes, making the scoring somewhat arbitrary . ( Frequently the lights represented scores in the hundreds of thousands . ) Then later, during the 1950s and 1960s when the scoring mechanism was limited to mechanical wheels, high scores were frequently only in the hundreds " or " thousands . ( Although, in an effort to keep with the traditional high scores attained with the painted backglass games, the first pinball machines to use mechanical wheels for scoring, such as " Army Navy ", allowed the score to reach into the millions by adding a number of permanent zeros to the end of the score . ) The average score changed again in the 1970s with the advent of electronic displays.