| Good morning. Today's lecture is about the Greenhouse Effect. The “greenhouse effect" often gets a bad rap because of its association with global warming, but the truth is we couldn't live without it. First, I'd like to ask you what causes the greenhouse effect. Life on earth depends on energy from the sun. About 30% of the sunlight that beams toward Earth is deflected by the outer atmosphere and scattered back into space. The rest reaches the planet's surface and is reflected upward again as a type of slow-moving energy called infrared radiation. As it rises, infrared radiation is absorbed by greenhouse gases such as water vapor, carbon dioxide, ozone and methane, which slows its escape from the atmosphere. Although greenhouse gases make up only about 1% of the Earth's atmosphere, they regulate our climate by trapping heat and holding it in a kind of warm air blanket that surrounds the planet. This phenomenon is what scientists call the “greenhouse effect." | |
| 早上好。今天的演讲内容是关于温室效应。由于全球变暖的关系，“温室效应”变得臭名远扬。但事实上我们的生活离不开它。首先,我想问你是什么原因导致温室效应的?地球上的生命依赖于来自太阳的能量。大约30%的太阳光照向地球，受外层大气影响偏转并散射回太空。其余的太阳光照在地球表面，作为一种缓慢移动的能量---红外辐射再反射到太空。红外辐射在上升过程中被“温室气体”吸收,如水蒸气、二氧化碳、臭氧和甲烷，从而减慢其在大气层消失的速度。虽然温室气体只占地球大气的1%,它们却通过隔离热量并储存在一种围绕着地球的热空气层里来调节气候。这种现象是科学家们所谓的“温室效应”。 |
| Good morning. Today' s lecture is about the Greenhouse Effect. The " greenhouse effect" often gets a bad rap because of its association with global warming, but the truth is we couldn' t live without it. First, I' d like to ask you what causes the greenhouse effect. Life on earth depends on energy from the sun. About 30 of the sunlight that beams toward Earth is deflected by the outer atmosphere and scattered back into space. The rest reaches the planet' s surface and is reflected upward again as a type of slowmoving energy called infrared radiation. As it rises, infrared radiation is absorbed by greenhouse gases such as water vapor, carbon dioxide, ozone and methane, which slows its escape from the atmosphere. Although greenhouse gases make up only about 1 of the Earth' s atmosphere, they regulate our climate by trapping heat and holding it in a kind of warm air blanket that surrounds the planet. This phenomenon is what scientists call the " greenhouse effect." | |
| zao shang hao. jin tian de yan jiang nei rong shi guan yu wen shi xiao ying. you yu quan qiu bian nuan de guan xi," wen shi xiao ying" bian de chou ming yuan yang. dan shi shi shang wo men de sheng huo li bu kai ta. shou xian, wo xiang wen ni shi shen me yuan yin dao zhi wen shi xiao ying de? di qiu shang de sheng ming yi lai yu lai zi tai yang de neng liang. da yue 30 de tai yang guang zhao xiang di qiu, shou wai ceng da qi ying xiang pian zhuan bing san she hui tai kong. qi yu de tai yang guang zhao zai di qiu biao mian, zuo wei yi zhong huan man yi dong de neng liang hong wai fu she zai fan she dao tai kong. hong wai fu she zai shang sheng guo cheng zhong bei" wen shi qi ti" xi shou, ru shui zheng qi er yang hua tan chou yang he jia wan, cong er jian man qi zai da qi ceng xiao shi de su du. sui ran wen shi qi ti zhi zhan di qiu da qi de 1, ta men que tong guo ge li re liang bing chu cun zai yi zhong wei rao zhao di qiu de re kong qi ceng li lai tiao jie qi hou. zhe zhong xian xiang shi ke xue jia men suo wei de" wen shi xiao ying". |
| Good morning. Today' s lecture is about the Greenhouse Effect. The " greenhouse effect" often gets a bad rap because of its association with global warming, but the truth is we couldn' t live without it. First, I' d like to ask you what causes the greenhouse effect. Life on earth depends on energy from the sun. About 30 of the sunlight that beams toward Earth is deflected by the outer atmosphere and scattered back into space. The rest reaches the planet' s surface and is reflected upward again as a type of slowmoving energy called infrared radiation. As it rises, infrared radiation is absorbed by greenhouse gases such as water vapor, carbon dioxide, ozone and methane, which slows its escape from the atmosphere. Although greenhouse gases make up only about 1 of the Earth' s atmosphere, they regulate our climate by trapping heat and holding it in a kind of warm air blanket that surrounds the planet. This phenomenon is what scientists call the " greenhouse effect." | |
| zǎo shàng hǎo. jīn tiān de yǎn jiǎng nèi róng shì guān yú wēn shì xiào yìng. yóu yú quán qiú biàn nuǎn de guān xì," wēn shì xiào yìng" biàn de chòu míng yuǎn yáng. dàn shì shí shàng wǒ men de shēng huó lí bù kāi tā. shǒu xiān, wǒ xiǎng wèn nǐ shì shén me yuán yīn dǎo zhì wēn shì xiào yìng de? dì qiú shàng de shēng mìng yī lài yú lái zì tài yáng de néng liàng. dà yuē 30 de tài yáng guāng zhào xiàng dì qiú, shòu wài céng dà qì yǐng xiǎng piān zhuǎn bìng sǎn shè huí tài kōng. qí yú de tài yáng guāng zhào zài dì qiú biǎo miàn, zuò wéi yī zhǒng huǎn màn yí dòng de néng liàng hóng wài fú shè zài fǎn shè dào tài kōng. hóng wài fú shè zài shàng shēng guò chéng zhōng bèi" wēn shì qì tǐ" xī shōu, rú shuǐ zhēng qì èr yǎng huà tàn chòu yǎng hé jiǎ wán, cóng ér jiǎn màn qí zài dà qì céng xiāo shī de sù dù. suī rán wēn shì qì tǐ zhǐ zhàn dì qiú dà qì de 1, tā men què tōng guò gé lí rè liàng bìng chǔ cún zài yī zhǒng wéi rào zháo dì qiú de rè kōng qì céng lǐ lái tiáo jié qì hòu. zhè zhǒng xiàn xiàng shì kē xué jiā men suǒ wèi de" wēn shì xiào yìng". |
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