液体硅酸钠,刑事侦查学_ 世界蚕业 ( world sericulture ) 申请校内,陈思安个人资料_香附豆腐汤
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China was the first country in the world to cultivate silkworms and develop silk weaving. More than 3,000 years ago, sericulture and silk weaving were already significantly developed.
中国是世界上最早发明养蚕和丝织的国家;早在3,000多年以前,蚕桑、丝织已相当发达。
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