基本解释[经济学]丝芯纱英汉例句双语例句It forms a special composite yarn with cotton as the core thread covered by mulberry silk.它以棉纱为芯，桑蚕丝包复在芯线外层，形成独特的真丝复合丝新材料。silk core yarn更多例句专业释义经济学丝芯纱