求翻译：丝纤维的纺织原料是桑蚕丝和柞蚕丝，属动物纤维，也是动物纤维中最长的一种纺织品纤维。丝纤维的主要成份是丝质和丝胶，二者都是蛋白质，另外还有少部分脂肪。是什么意思？

The silk fiber textile raw silk and silk, is the animal fiber, animal fiber up to a textile fiber. The main ingredients of the silk fiber silk and sericin, both proteins, in addition to a small number of fat.

silk fiber textile raw materials and tussah silk, herbs extract is an animal fiber, and is also the longest animal fiber in a textile fiber. The main ingredient is silk fiber silk and silk, and 2 are protein, and there are fewer fat part.

Silky fiber textile raw material is the mulberry silk and the tussah silk, is the animal fiber, also is in the animal fiber the longest one kind of textile textile fiber.The silky fiber essential component is the fibroin and the sericin, the two all are the protein, moreover also has little the part

Mulberry silk and tussah silk fiber textile raw materials are, an animal fiber, is a textile fiber of the longest animal fibers. Fiber silk and silk is the main ingredient of gum, both proteins, there are also some less fat.

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