Unit 4 Global warming温室效应自地球形成以来，它就一直在起作用。如果没有温室效应，地球表面就会寒冷无比，温度就会降到零下 20 摄氏度，海洋就会结冰，生命就不会形成。因此，我们面临的不是有没有温室效应的问题，而是大量污染的气体排入大气层，致使温室效应与地球气候发生急剧变化的问题。 参考词汇：温室效应 greenhouse effect; 零下 20 摄氏度 minus 20 degrees Celsius 【写作要求】 只能用 5 个句子表达全部内容。The greenhouse effect has come into being since the Earth was formed. Without it, the Earth's surface would be extremely cold and the temperature will be dropped to minus 20 degrees Celsius. Besides, the ocean will be turned to ice, and no living things can survive and exist. Therefore, we are not faced with the greenhouse effect, but a large amount of polluted gases into the atmosphere, causing the greenhouseeffect and the Earth's climate changed. That is why we should take into consideration the serious global warming.1. vt. 消费；消耗；耗尽；吃完2. n. 现象3. vi. 同意；捐赠 vt. 签署(文件)；捐赠4. n. 数量；量5. vi. 趋向；易于 vt. 照顾；护理6. n. 趋势；倾向；走向____________________ ____________________ ____________________ ____________________ ____________________ ____________________consume phenomenon subscribe quantity 用心 爱心 专心1 tend trend7. vt. 反对；反抗8. n. 结果；后果；影响9. vt. 陈述；说明10. n. 种类；范围11. vi. 看一下 n. 一瞥12. adj. 持续的；稳固的13. n. 倾向；趋势____________________ ____________________ ____________________ ____________________ ____________________ ____________________ ____________________oppose consequence state range glance steady tendency14. adj. 分布广的；普遍的15. adj. 平均的16. vt. 拥护；提倡；主张17. adj. 随便的；漫不经心的；偶然的18. n. 环境；情况19. vt. 使恢复；使振作20. n. 分歧；不一致____________________ ____________________ ____________________ ________...
