extraneous

extraneous
[ɪkˈstreɪnɪəs, ɛks-]
adjective
  1. irrelevant or unrelated to the subject or matter being dealt with
    无关的
    one is obliged to wade through many pages of extraneous material.
    每个人都得苦读很多页无关的资料。
    ■of external origin
    外来的；外面的
    when the transmitter pack is turned off no extraneous noise is heard.
    关掉发射机组件后就听不到外面的噪音了。
    ■separate from the object to which it is attached
    体外的；外部的
    other insects attach extraneous objects or material to themselves.
    其他昆虫把体外物体或物质附着在自己身上。
派生
extraneously
adverb
extraneousness
noun
语源
  1. mid 17th cent.: from Latin extraneus + -ous
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