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Light Emitting Diode Basic

Unlike incandescent lamps, LEDs are not inherently white light source. Instead, LED emit nearly monochromatic light, making them highly effcient for colored light applications such as traffic lights and exit signs. However, to be used as a general light, making them highly efficient for colored light applications such as traffic light and exit signs. However, […]

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林湖重游

大约在1940年的夏天,父亲在缅因州一处湖边租了营地,整个八月都带着我们住在那里。我们从小猫身上染上了癣症,不论白天黑夜都需往腿和胳膊上涂抹庞氏乳膏,父亲则带着他所有的衣服睡在小木船里…

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