These joints of steel can move without breaking.

这种钢接合在移动时不会断裂。

It takes heavy machinery to produce it and building those machines with concrete and steel can have a negative environmental impact.

它需要用重型机械来生产，而制造重型机械所需要的混凝土和钢铁会对环境产生负面影响。

But, steel can experience brittle failures too, called fractures, where little deformation occurs.

但是，钢也会经历脆性破坏，称为断裂，几乎不会发生变形。

Fire can destroy the wights, but only dragon fire, dragonglass, and Valyrian steel can kill White Walkers.

火可以摧毁尸鬼，但只有龙火、龙晶和瓦雷利亚钢才能杀死白鬼。

A number of inventions and improvements followed, and by the 1860s, smaller machine-made steel cans were possible, and the time to cook food in sealed cans were reduced from around six hours to 30 minutes.

许多的发明和改进随之而来。到 1860 年代，小机器制造的钢罐也投入使用，而加工密封罐装食物的时间从大约六个小时减少到三十分钟。