唯一的声响是冰层噼噼啪啪碎裂的声音。The only sound was the crackle of breaking ice.人们开始四下察看，想弄清楚那声响来自何处。People began looking across to see where the noise was coming from.她一直在房间里工作，直到有声响打扰了她。She'd been working in her room till a nois...
The observed friction force is the force required to break these tiny welds.我们观察到的摩擦力,就是破坏这些细微的焊接点所需要的力.Arc strikes outside of the welds were avoided.焊缝外要避免电弧穿刺.A crawler, device of girth welds testing outside pipeline i...