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After 50 days of gluttony
在長達五十天的暴飲暴食之后
they've grown 10 thousand times heavier
他們增重至幼蟲體重的一萬倍
But this stage
然而這個時期
25 percent of their body mass is made up of silk glands
絲腺占了體重的四分之一
In the process of turning into adult moths
在轉化成蛾的過程中
they spin a cocoon from a single strand of silk
他們從一條絲開始吐絲成繭
which can be over a thousand meters long
絲長甚至超過千米
It was the legendary strength and brightness of silk fibers
絲質纖維因其超凡韌性和艷麗色澤
that made it so sought-after
而廣受歡迎
For over 5000 years,
五千多年來
people built great fortunes and mighty kingdoms
人們在纖瑩的絲線上編織出巨大的財富
on these delicate threads.
和強大的帝國
And the desert routes those antient traders took
古代商人在沙漠中留下的行商路線
became the fabled Silk Road
成就“絲綢之路”的偉大傳說
The principle of extracting raw silk hasn't changed
從生絲中繅絲的原理自發現伊始
since it's discovered
就一直未變
Harvested cocoons are droped into boiling water
將收獲的繭倒入沸水中
which unravels the long filaments
使細長的絲繭散釋開來
These are then gathered and spun into raw silk thread
然后將之收集起來紡成生絲線
