There is nothing like watching fireflies light up the sky on a warm evening. The sight of hundreds of fireflies twinkling in the night can create a magical memory. While the firefly’s ability to produce light may be fascinating, it isn’t actually magic. People have wondered for a long time how fireflies can light up their bodies. Unlike most types of illumination, the light of a firefly isn’t hot. It is known as “cold light.” Scientists have studied these beautiful insects closely and now have a clear understanding of how they produce light.
没有什么比得上在温暖的夜晚观看萤火虫照亮天空。数百只萤火虫在夜空中闪烁的景象可以留下如梦似幻的回忆。虽然萤火虫发光的能力或许令人著迷，但它并不是魔法。长期以来，人们一直想知道萤火虫是如何照亮牠们的身体。不同于大多数类型的光，萤火虫的光并不热。它被称作「冷光」。科学家仔细研究了这些美丽的昆虫，现在对牠们如何发光有了清楚的了解。
生活必备字词：
light up... 点亮∕照亮……
magical a. 魔幻的；神奇的
understanding n. 理解
have an understanding of... 对……有所了解
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本文节录自《常春藤生活英语》杂志，完整内容请见五月号。
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