通过昆明市当前机动车尾气污染对城市空气质量的影响，分析其变化趋势。
The changing trend of vehicle tail gas pollution in Kunming is analyzed by investigating the impacts on air quality from tail gas emission.
本文就住宅起居室的其功能和形式的现状及其变化原因、发展趋势进行了分析。
This article makes an analysis of the function and form of living room, its cause of change and developing trend.
通过对1961 年以来青南高原气候变化的分析，发现该地区年平均降水量及秋季降水量无明显的变化趋势，且其年际间的波动趋于缓和；
The climatic variations since 1961 on Qinghai south plateau were analyzed in this paper. It indicated that the annual and autumn precipitation did not have significant tendency of variation.
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