And the panels have to stay dust-free: just a seventh of an ounce of dust per square yard of panel can decrease solar power conversion by 40 percent.
偏偏太阳能板需要一个无尘的环境：每平方码只要有七分之一盎司的尘土就会降低太阳能板40%的转换效率。
Both the Hall of Prayer for Good Harvests and the Circular Mound Altar are round, each standing on a square yard, again representing Heaven and Earth.
祈年殿与圜丘坛均为圆形，立于方形坛内，象征着天圆地方。
The forests of British Columbia, Unesco says, are home to more life per square yard than anywhere else on Earth: elk, wolves, hawks, bears… Yet there was barely a bird in the trees.
联合国教科文组织认为，在不列颠哥伦比亚省每平方码的土地上，动物比世界上任何其它地方都要多：驼鹿，狼，秃鹰，熊…，然而我没有看见树上有一只鸟。
The auditorium is separated from the school by a square yard. The school is an unobtrusive four-storey block, to which the expressive form of the auditorium forms a strong contrast.
礼堂与学校的教学主楼之间被一个矩形的广场分开，使礼堂特立独行的形象与不够突出的四层教学楼形成了强烈的对比。
The auditorium is separated from the school by a square yard. The school is an unobtrusive four-storey block, to which the expressive form of the auditorium forms a strong contrast.
礼堂与学校的教学主楼之间被一个矩形的广场分开，使礼堂特立独行的形象与不够突出的四层教学楼形成了强烈的对比。
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