This relation between empty and full in the facade allows for an excellent thermal performance, with a high degree of electric energy conservation.
外观空缺和密实之间的关系提供了卓越的热工性能，并可高度节约电能。
The background sound of an environment in relation to which all foreground sounds are heard, such as the 'silence' of an empty room, conversation in a restaurant, or the stillness of a forest.
环境的背景声音指的是所有可听到的突出声音，比如空房间里的“静默之声”，餐馆里的谈话，或者森林里的沉寂。
Objective: To investigate the social support of the empty-nest elderly people lived in urban area and its relation with their mental health.
结论：不同家庭结构的城市空巢老人的社会支持存在差异，社会支持影响城市空巢老人的心理健康状况。
Objective: To investigate the social support of the empty-nest elderly people lived in urban area and its relation with their mental health.
结论：不同家庭结构的城市空巢老人的社会支持存在差异，社会支持影响城市空巢老人的心理健康状况。
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