跳光点[ 电影印片机上所用的曝光量档次，每一档曝光量对数增量] change point: 变化点; 变换点; 变异点; 改变点; 转变点; 转点light point: 照明插座point light: 点光远change a light bulb: 换个灯泡change dark into light: 化暗为明下载手机词典可随时随地查词查翻译
