In the ancient world there were seven great man-made structures for travelers to see on a world tour.

对于环游世界的旅行者来说，古代世界有七个值得参观的伟大的人工建筑。

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Sunken treasures, Marine animals and man-made structures all make up the mysterious depths of the underwater world.

沉没的宝藏，海洋动物和人造结构的所有组成的水下世界的神秘深处。

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Nonetheless, human activities in road construction, farming, and man-made structures have accelerated the alteration of the environment in the high mountain region.

然而借由人类的系列活动，包括道路的开辟、高冷蔬果的种植以及人造结构物的兴建等，大大的改变了高山地区的生态环境。

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It challenges judgement with unpredictability and consequences in a way that man-made structures cannot, she says.

BBC: What can we learn from climbing trees?

Many of them question whether cultural phenomena, including destruction layers, cultural-piercing features (man-made structures displaced by surface rupturing, e.g. viaducts), structural damage to buildings, indications of repairs, historical accounts and myths can be reliably used as earthquake indicators.

UNESCO: Tales set in Stone: learning from ancient earthquakes

The University of Aberdeen has received the financial backing to develop man-made proteins closely related to structures found in sharks.

BBC: Shark