While it is unknown just how much of this is true, it is certainly known that silk cultivation has existed in China for several millennia.
虽然我们不知道这其中有多少是真实的，但可以肯定的是，丝绸栽培在中国已经存在了几千年。
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Dr. Kaplan has been researching silk for 21 years — “sad but true, ” he joked — and spent much of the first decade learning about the fundamental mechanisms by which silk assembles.
"Dead silkworm silk ended. candles burn into ash still" this is the most true portraiture of you, thank you, teach us knowledge, thank you for helping us paved the multicolored life.