1·Positive vertical temperature gradient in concrete and steel superstructures.
混凝土和钢筋上部结构正垂直温度梯度。
2·It's not easy to say exactly how superstructures will change, and in what direction.
上层建筑要怎么变，朝什么方向变，不是能简单说清楚的。
3·It is one of the planet's newest awe-inspiring superstructures - the Hoover Dam Bridge.
这是这颗星球上令人敬畏惊叹的最新超级建筑之一——胡佛大坝桥。
4·Tunable superstructures were obtained in hydrothermally etched iron-passivated porous silicon (IPS).
采用水热腐蚀技术制备的铁钝化多孔硅表面具有可调超结构。
5·The superstructures of cable-stayed bridge mainly include three parts:tower, main girder and stay cable.
斜拉桥上部结构包括三个主要部分：索塔、主梁和斜拉索。
6·Manufacturers of the early 1900s were using steel pipe, angle or channel for the greenhouse superstructures.
二十世纪初期制造商们就已用钢管、角铁以及槽钢之类的材料建造温室的上部结构。
7·Other applications for fibre composites within ship-building are found in superstructures and secondary structures.
另外，在造船业中纤维增强复合材料也被用于上层建筑和二级结构中。
8·Due to the atmosphere temperature change, the bridge superstructures' thermal deformation exist impersonality which is a fact.
由于周围大气温度的变化，桥梁上部结构产生的温度变形是一个客观存在的事实。
9·Recently the collisions between over-high trucks and bridge superstructures have become a serious threaten to the safety of city traffic.
摘要近年，超高车辆撞击桥梁上部结构问题成为城市交通安全的重要威胁。
10·Abstract: Recently the collisions between over-high trucks and bridge superstructures have become a serious threaten to the safety of city traffic.
摘要：近年，超高车辆撞击桥梁上部结构问题成为城市交通安全的重要威胁。