相关推荐： 高中生英语美文 高中英语美文积累
美文,是文质兼美的文章。引导学生读好读美,诵读悟情积累。学生对美的体验和领悟,来自感觉的整体性,一定要从语言材料的氛围中去获得。小编整理了高中英语美文，欢迎阅读!
高中英语美文篇一
The Source of Energy
A summary of the physical and chemical nature of life must begin, not on the Earth, but in theSun; in fact, at the Sun's very center. It is here that is to be found the source of the energythat the Sun constantly pours out into space as light and heat. This energy is liberated at thecenter of the Sun as billions upon billions of nuclei of hydrogen atoms collide with each otherand fuse together to form nuclei of helium, and in doing so, release some of the energy that isstored in the nuclei of atoms. The output of light and heat of the Sun requires that some 600million tons of hydrogen be converted into helium in the Sun every second. This the Sun hasbeen doing for several thousands of millions of years.The nuclear energy is released at theSun's center as high-energy gamma radiation, a form of electromagnetic radiation like lightand radio waves, only of very much shorter wavelength. This gamma radiation is absorbedby atoms inside the Sun to be reemitted at slightly longer wavelengths.This radiation, in itsturn is absorbed and reemitted. As the energy filters through the layers of the solar interior, itpasses through the X-ray part of the spectrum eventually becoming light. At this stage, ithas reached what we call the solar surface, and can escape into space without being absorbedfurther by solar atoms. A very small fraction of the Sun's light and heat is emitted in suchdirections that after passing unhindered through interplanetary space, it hits the Earth.
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