This invention discloses a technology for producing polyamide core wrapped weft yarn which is composed of long polyamide fibre and natural cotton fibre.
2
传统上，衣服是由天然材料制成的，如棉花、皮革和羊毛。
Clothes are traditionally made of natural materials, such as cotton, leather and wool.
3
你可能会想：牛仔布不是由棉花这种天然材料制成的吗？
You might wonder: Isn't denim made of cotton, a natural material?
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