寸阴，是指以寸为单位阳光下“表”的阴影。犹“寸晷”。指暂短的光阴。语出《淮南子·原道训》：“圣人不贵尺之璧，而重寸之阴，时难得而易失也。”
我们家还在用那种老式的36英寸阴极射线管(CRT)电视机。
不饱食以终日，不弃功于寸阴。持之以恒，契而不舍，最终必然出类拔萃，与众不同。
If one is not sated with food all day long nor gives up his efforts lightly, but sticks to something with perseverance and persistence, he is sure to be prominent and extraordinary in the end.
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