生态趋势研究(ecological trend study) 是连续观察不同人群中某因素平均暴露水平的改变和(或)某种疾病的发病率、死亡率变化的关系，了解其变动趋势；通过比较暴露水平变化前后疾病频率的变化情况，来判断某因素与某疾病的联系。
本论文首先对绿色生态住宅开发的历史背景、必然性、发展趋势以及意义做了较为系统的研究。
This dissertation make a systemic study about historical background, inevitability, develop trend and meaning of ecological house exploitation firstly.
高技术建筑的生态化是近年来的发展趋势，对生态化的研究可以从理念、方法和技术措施三个层面进行。
The ecological architectural design is the trend of Hi-Tech architecture development, and Three levels of idea, method and technique are studied.
通过建立的方法，对研究矿区的生态系统健康趋势进行了评价，并提出了相应的对策和建议。
Based on the method established, the trends of ecosystem health in the mining area being studied are evaluated, and the appropriate measures and Suggestions are recommended.
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