求翻译：进入21世纪，能源紧张问题日益突出。世界各国在不断提高能源利用效率的同时，还不断开发新的能源。太阳能作为世界上最清洁、最丰富的能源备受世界的关注。太阳能住宅的设计也在不断探索和尝试中。太阳能的利用是近几十年全世界一直在研究和探索的课题。随着科技的发展，太阳能与住宅结合也越来越深入，从被动式技术到主动式技术；从太阳能墙到太阳能光伏发电、太阳能热水、太阳能空调，所有太阳能技术均在住宅上实践、利用。是什么意思？

Entering the 21st century, energy crisis problem growing. While the world continues to improve energy efficiency and continuous development of new energy sources. Solar energy as the world's cleanest, most abundant energy is the world's attention. Solar residential design continues to explore and try. The use of solar energy in recent decades the world has been subject of research and exploration. With the development of science and technology, solar and residential combined with more and more in depth, from passive technologies to active technology; from solar wall to solar PV, solar hot water, solar air conditioning, practice, on all solar technologies in residential use.