The elasticity of silk woven fabrics is formed by the twist release of hard twist on weft yarn.

全真丝纬向弹力机织物的弹力主要利用强捻纬线的捻度释放来形成。

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But from mulberry growing and silkworm raising to beautiful silk, silk productipn needs a lot of steps and hard work.

从种桑养蚕到织成美丽的丝绸，这中间要经过繁复的步骤和艰辛的劳动。

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With the help of the science and technology, glass can be made as hard as steel, or as soft as silk, or as light as paper, or as heavy as iron.

借助于科学技术，玻璃可以被制作的像钢一样硬，像丝一样柔，像纸一样轻，像铁一样重。

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