1. This is the extant manuscript of the poem.
    这是现存的该诗的原稿。

1. 现存的：exquisite#精美的;灵敏的 | extant#现存的 | extensive#大量的;广泛的

2. 作者遗著手稿：explanations of words in ancient books,gloss(行间页边的注释) 训诂 | extant 作者遗著手稿 | fairy-story,fairytale 神话故事

3. extant的反义词

3. 现已存在的：删除-----expunging | 现已存在的-----extant | 引伸而适用于-----extend

1. 尚存的;现存的
    If something is extant, it is still in existence, in spite of being very old.

    e.g. Two fourteenth-century manuscripts of this text are still extant...
           这个文本仍有两份14世纪手抄本存世。
    e.g. The oldest extant document is dated 1492.
           现存最古老的文献出自1492年。