Gǔ / jí / zhōng / jì / zǎi / le / yì / zhǒng / yòng / zhè / shù / yè / yǎng / cán / zhì / chéng / de / zhè / sī

古籍中记载了一种用柘树叶养蚕制成的柘丝。

Ancient texts record a type of silk made from silkworms fed on mulberry leaves.