亚洲精品一区-91视频免费在线观看-老司机精品福利视频-日本国产一区-国产黄色精品-久久久久久亚洲精品

考研優美英語作文的背誦045

雕龍文庫 分享 時間: 收藏本文

考研優美英語作文的背誦045

  TheSource of Energy

  A summary of the physical and chemical nature of life must begin,not on the Earth, but in the Sun; in fact, at the Suns very center. It is herethat is to be found the source of the energy that the Sun constantly pours outinto space as light and heat. This energy is liberated at the center ofthe Sun as billions upon billions of nuclei of hydrogen atoms collide witheach other and fuse together to form nuclei of helium, and in doing so, releasesome of the energy that is stored in the nuclei of atoms. The output of lightand heat of the Sun requires that some 600 million tons of hydrogenbe converted into helium in the Sun every second. This theSun has been doing for several thousands of millionsof years. The nuclear energy is released at the Suns center ashigh-energy gamma radiation, a form of electromagnetic radiationlike light and radio waves, only of very much shorter wavelength. Thisgamma radiation is absorbed by atoms inside the Sun to be reemitted atslightly longer wavelengths. This radiation, in its turn is absorbed and reemitted. As the energy filters through the layers of thesolar interior, it passes through the X-ray part of the spectrumeventually becoming light. At this stage, it has reached what we call the solarsurface, and can escape into space without being absorbed further by solaratoms. A very small fraction of the Suns light and heat is emitted in such directions that after passing unhindered throughinterplanetary space, it hits the Earth.

  全文翻譯:能量的來源

  概說生命的物理和化學特性必須始于太陽--確切地說,是太陽的核心,而非地球。能量來自太陽的核心。在這里,太陽不停地以光和熱的形式向空間傾瀉出能量。 數十億計的 氫原子核在太陽的核心碰撞并且聚變生成氦。在此過程中一部分原本儲存于原子核中的能 量被釋放出來。太陽所產生的光和熱需要每秒將六億噸氫轉化為氦。這樣的轉化在太陽中已經持續幾十億年了。核能在太陽的核心被釋放為高能的伽馬射線。這是一種電磁射線,就象光波和無線電波一樣,只是波長要短得多。這種伽瑪射線被太陽內的原子所吸收,然 后重新釋放為波長稍長一些的光波。這新的射線再次被吸收,而后釋放。在能量由太陽內部一層層滲透出來的過程中,它經過了光譜中 X 射線部分,最后變成了光。在此階段,能量到達我們所稱的太陽表層,并且離散到空間而不再被太陽原子所吸收。只有很小一部分太陽的光和熱由此方向釋放出來,并且未被阻擋,穿越星空,來到地球。

  

  TheSource of Energy

  A summary of the physical and chemical nature of life must begin,not on the Earth, but in the Sun; in fact, at the Suns very center. It is herethat is to be found the source of the energy that the Sun constantly pours outinto space as light and heat. This energy is liberated at the center ofthe Sun as billions upon billions of nuclei of hydrogen atoms collide witheach other and fuse together to form nuclei of helium, and in doing so, releasesome of the energy that is stored in the nuclei of atoms. The output of lightand heat of the Sun requires that some 600 million tons of hydrogenbe converted into helium in the Sun every second. This theSun has been doing for several thousands of millionsof years. The nuclear energy is released at the Suns center ashigh-energy gamma radiation, a form of electromagnetic radiationlike light and radio waves, only of very much shorter wavelength. Thisgamma radiation is absorbed by atoms inside the Sun to be reemitted atslightly longer wavelengths. This radiation, in its turn is absorbed and reemitted. As the energy filters through the layers of thesolar interior, it passes through the X-ray part of the spectrumeventually becoming light. At this stage, it has reached what we call the solarsurface, and can escape into space without being absorbed further by solaratoms. A very small fraction of the Suns light and heat is emitted in such directions that after passing unhindered throughinterplanetary space, it hits the Earth.

  全文翻譯:能量的來源

  概說生命的物理和化學特性必須始于太陽--確切地說,是太陽的核心,而非地球。能量來自太陽的核心。在這里,太陽不停地以光和熱的形式向空間傾瀉出能量。 數十億計的 氫原子核在太陽的核心碰撞并且聚變生成氦。在此過程中一部分原本儲存于原子核中的能 量被釋放出來。太陽所產生的光和熱需要每秒將六億噸氫轉化為氦。這樣的轉化在太陽中已經持續幾十億年了。核能在太陽的核心被釋放為高能的伽馬射線。這是一種電磁射線,就象光波和無線電波一樣,只是波長要短得多。這種伽瑪射線被太陽內的原子所吸收,然 后重新釋放為波長稍長一些的光波。這新的射線再次被吸收,而后釋放。在能量由太陽內部一層層滲透出來的過程中,它經過了光譜中 X 射線部分,最后變成了光。在此階段,能量到達我們所稱的太陽表層,并且離散到空間而不再被太陽原子所吸收。只有很小一部分太陽的光和熱由此方向釋放出來,并且未被阻擋,穿越星空,來到地球。

  

主站蜘蛛池模板: 97精品国产91久久久久久久 | 国产精品久久久久久久y | 久久国产欧美日韩精品免费 | 国产亚洲欧美在线人成aaaa | 一级毛片真人不卡免费播 | 久久亚洲一级毛片 | 香蕉网站狼人久久五月亭亭 | 日韩精品一区二区三区免费观看 | 久久这 | 亚洲国产综合人成综合网站00 | 日韩一区二区三区四区不卡 | 免费视频观看在线www日本 | 欧美精品一区二区在线观看 | 免费看一毛一级毛片视频 | 另类欧美日韩 | 日韩三级在线播放 | 亚洲精品一区二区三区在 | 国产成人福利免费观看 | 国产欧美日韩精品第一区 | 欧美一级在线观看播放 | 国产视频中文字幕 | 成人观看视频又黄又免费 | 欧美精品伊人久久 | 色国产精品 | 亚洲日本韩国在线 | 成年免费在线观看 | 亚洲性影院 | 亚洲人成一区二区三区 | 国产91久久精品一区二区 | 久久国产精品免费观看 | 在线观看香蕉免费啪在线观看 | 国产高清一级视频在线观看 | 一区二区三区四区国产精品 | 亚洲 欧美 91| 国产亚洲精品日韩已满十八 | 久久免费视频6 | 亚洲一区二区三区精品国产 | 亚洲视频 欧美视频 | 成人欧美一级毛片免费观看 | 免费看黄色的网址 | 亚洲人成综合在线播放 |