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They have given up weekends to hide unsightly cables behind ledges .

他们放弃周末的休息将不雅观的电缆藏于壁架后。

Few other land predators are able to reach the precarious nesting ledges .

几乎没有其他陆地食肉动物能够到达这么陡峭的筑巢的岩壁。

Ice ledges or shelves such as this are built up during successive winter storms when strong winds and large waves deposit an icy slush onto newly formed shore ice .

这些冰棚或冰架是密歇根湖在接连不断的冬季风暴作用下，强风和巨浪把含冰的融雪沉淀到新形成的湖岸冰块上所形成的。

Nevertheless , the rats were easily guided through pipes and across elevated runways and ledges , and could be instructed to climb , or jump from , any surface with a good foothold , such as a tree , the scientists write in nature .

科学家们在《自然》杂志上写到：不过，老鼠们还是可以在指导下很容易地通过管道，穿过高架跑道和壁架，并且在命令下还可以在树这样有不错的落脚点的平面上跳跃。

Hoff liked to collect pictures of trees in improbable places : ponderosa pines sprouting from boulders in the sierras , holly oaks clinging to ledges of extremadura granite in spain .

霍夫喜欢收集那些长在恶劣环境中的树的照片：从寒拉斯的大石头里长出的西黄松，攀援在西班牙埃斯特雷马杜拉花岗岩壁架上的圣栎树。