For starters, safely taking pictures of the sun requires a special solar filter on the camera.

对初学者来说，安全地拍摄太阳照片的相机上需要一个特殊的太阳滤波器。

youdao

The choice of this enclosure material responds, on the one hand, to its role as a solar filter offering at the same time porosity, light entrance and ventilation to the elevator case.

外围护结构材料的选择，一方面，由于孔隙率的控制使其成为太阳滤波器，可以照入一些阳光，照亮入口空间，也有利于梯井内的通风。

youdao

The amount involved is minuscule, as is the quantity of electricity needed to keep the filter charged (a small solar panel would be sufficient to supply it).

它所耗费的成本是微不足道的，只是这种过滤器需要一定的电能(一个小型太阳能板足够给它供能)。

youdao

The owner had window film applied, followed by white "sheer-weave" motorized solar shades to filter light but leave the view intact.

WSJ: Sheer Curtains, Solar Shades Are Popular Window Treatments

Beyond that, it was fascinating to see seeing what Detroit automakers are doing to reduce their carbon footprints, like using green roofs that insulate their buildings, porous pavement to filter rain water and even solar panels to help power their facilities.

FORBES: An Eye-Opening Trip To The Motor City

We also covered several off-grid devices that we'd like to have in the event of another storm of Sandy's magnitude -- Nokero's compact SunRay Pro solar charger, Berkey's super-versatile and effective water filter and Eton's hand-crank cellphone charger.

ENGADGET: Inhabitat's Week in Green: Dyson Spheres, bladeless wind turbines and airless bike tires