Summarizes the historical and present status of the study of thermal comfort of occupants and indoor air quality, looks forward to developing trends in this research field.
综述人体热舒适和室内空气品质研究的历史和现状，展望该研究的发展趋势。
The present status of the study on rare-earth heat stabilizer has been reviewed, especially about its synthesis, properties of heat stabilization, processing and mechanical properties of PVC product.
本文对PVC稀土热稳定剂的研究现状做了详细的综述，着重介绍了稀土稳定剂在合成、 热稳定性能、加工性能以及PVC制品的力学性能等各方面的研究开发情况。
At the same time, this paper also evaluated the present study status and prospect of the combination of children's literature and children's psycology objectively.
论文还花了一定的文字量客观评价了儿童文学与儿童心理学结合的研究现状，并对其发展前景进行了展望。
应用推荐