An equatorial sundial is an ancient scientific equipment to tell time by using the shadow from solar projection. It consists of a sundial plate, a gnomon and a base.

赤道式日晷，是古人利用太阳投影测时的科学仪器，由晷盘、晷针和底座组成。

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Viewing the Sun's harsh light should only be done through protective equipment - proper solar glasses and solar telescopes, or through a pinhole projection system.

直视骄阳是危险的，只能通过适合的日食镜、配有滤光片的望远镜或者针孔投影系统观看日食。

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The projection was based on research that identified how low solar activity affected winter weather patterns.

这项推测是根据一项研究得出的，该研究辨析出了太阳活动减弱会以何种方式影响到冬季的气候模式。

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It also notes a projection from Bloomberg that PV solar will grow by 22% annually through 2020, with 4.5 gigawatt-hours (4, 500 megawatt-hours) coming from on-site solar.

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States with the strongest projection for water-cooled concentrated solar power plants and capacity (more than 15 sites each) are California, Idaho, Montana, and Wyoming.

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