The history of mulberry planting and silkworm breeding is centuries-old in our country , the outcome and export quantum of the silk are the first in the world for a long time .
我国有着悠久的栽桑养蚕的历史，蚕丝的生产与出口长期以来雄踞世界首位。
The history of mulberry planting and silkworm breeding is centuries-old in our country , the outcome and export quantum of the silk are the first in the world for a long time .
我国有着悠久的栽桑养蚕的历史，蚕丝的生产与出口长期以来雄踞世界首位。
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