be nonextant
做表语时表示'不复存在'。
Many ancient languages are nonextant.
许多古代语言已不复存在。
不再存在的；已灭绝的；已遗失的
不存在的；已灭绝的。；不再存在的；灭绝的或特别是没有留下活的代表；不再存在或因丢失或毁坏而无法获得的；亡佚；非现生的
no longer existing; lost or extinct.
不存在的；已灭绝的。
Not extant.
不再存在的；灭绝的或特别是没有留下活的代表
no longer in existence; lost or especially having died out leaving no living representatives
不再存在或因丢失或毁坏而无法获得的
no longer existing or inaccessible through loss or destruction; - G.B.Saul
Many ancient languages are now nonextant, leaving only fragments for linguists to study.
许多古代语言现已不复存在，只留下零星片段供语言学家研究。
用法提示：nonextant 作形容词，表示‘不复存在的’，此处描述语言已消亡。
AI contextual example
The museum's collection includes several nonextant species once preserved in amber.
该博物馆的藏品包括几种曾保存在琥珀中的已灭绝物种。
用法提示：nonextant 修饰 species，指‘已灭绝的’，说明该物种已无活体存在。
AI contextual example
Due to deforestation, the once abundant forest bird is now considered nonextant.
由于森林砍伐，这种曾经数量众多的林鸟如今被认为已经灭绝。
用法提示：nonextant 作表语，强调该鸟类已不再存在。
AI contextual example
做表语时表示'不复存在'。
Many ancient languages are nonextant.
许多古代语言已不复存在。
作定语修饰名词，强调不再存在的状态。
The nonextant species left only fossil records.
这种已灭绝的物种只留下了化石记录。
表示从存在到消失的变化过程。
The manuscript became nonextant after the fire.
手稿在大火后不复存在。
extinct 常用于物种灭绝，语气比 nonextant 更具体；nonextant 更正式
defunct 常指机构、系统等已停用，比 nonextant 更具体地强调不再运作
vanished 强调消失的过程或状态，语气较文学化
lost 语义较宽，可指丢失或毁灭，不如 nonextant 正式
gone 为非正式用语，常用于口语，表示已消失或去世
grammar · medium
易错句子The nonextant of the dinosaur species is confirmed.
正确表达The dinosaur species is confirmed to be nonextant.
将nonextant误用作名词，实际上它是形容词，需要与系动词连用或修饰名词。
grammar · medium
易错句子The species nonextant after the extinction event.
正确表达The species is nonextant after the extinction event.
中文母语者易遗漏be动词，形容词作谓语时需要系动词。
nonextant尤指一类事物已无任何现存代表，extinct侧重物种完全消亡
nonextant指曾存在现已消失，nonexistent强调从未存在或完全不存在
adjective
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