常見(jiàn)例句雙語(yǔ)例句It forms a special composite yarn with cotton as the core thread covered by mulberry silk.它以棉紗為芯,桑蠶絲包復(fù)在芯線外層,形成獨(dú)特的真絲復(fù)合絲新材料。 返回 silk core yarn