1·My stepfather... found Mark's body hanging from the steel beam that ran through the living room.
我的继父……发现马克的尸体吊在穿过起居室的钢梁上。
2·It is increasingly used in the fireproof for steel structures such as steel beam and column and steel global frame structures of large halls.
它在钢结构的防火保护，如钢梁、 柱和球型架结构的防火保护上，愈来愈受欢迎。
3·The material's low density, however, would be less of an advantage for buildings on Earth, because it would take a lot of aerogel to do the work of a steel beam in a building, for example.
该材料的低密度，用地球上的建筑物将不再是一个优点。例如，会需要超量的气凝胶来取代建筑用的钢梁。