“一寸光阴一寸金,寸金难买寸光阴。”这是前人用来提醒和督促人们珍惜时光、抓紧学习的诗句。那么为什么把时间称作“光阴”呢?原来,古时候人们用“晷”来测量时间“,晷”是观测日影以定时刻的一种仪器。在圆形石板上刻上表明时间的度数,圆中心立一小棍,由日出到日落,小棍的阴 “An inch of time is an inch of gold, and it is difficult for an inch of gold to buy an inch of time.” This is a poem used by previous generations to remind and urge people to cherish their time and learn. So why do you call time “time”? In the past, people used “晷” to measure time. “晷” is an instrument for observing daytime shadows. Engraved on a round stone slab to indicate the degree of time, a small stick in the center of the circle, from sunrise to sunset, the yoke of the stick