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高中的时候 最喜欢考 学习计划 我的高中生活 外国友人访华你怎么安排行程 一些两面性的观点：分快慢班的利弊，。。。 还有和当时的一些实事问题有关的 比如 使用一次性塑料袋的利弊
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总体生态环境：the general ecological environment废气排放：exhaust emissions温室效应：the greenhouse effect二氧化碳：carbon dioxide二氧化硫：sulphur dioxide植被：vegetation cover生态系统：ecological system生态平衡：ecological balance恶化/退化：destruction/damage/weakening/degeneration/deterioration/retrogression土地盐碱化：salination-alkalinisation风化的土壤：crumbly soil表土层：top soil森林覆盖面率：forest cover rate植树造林：afforestation乱砍滥伐：deforestation防护林：shelter belt土地沙漠化：desertification滑坡：landslide泥石流：mud flow地形：topography高开发，高消费：high utilization of resources and high level consumption先污染，后治理：first pollute the environment and then take counter-measures节约资源，适度消费，协调发展，全面调控，综合治理，恢复生态平衡：saving natural resources, promoting moderate consumption, paying attention to coordinated development , implementing overall adjustment and control, protecting the environment comprehensively and restoring the ecological balance
