词汇串烧18 史无前例的unprecedented -“ceed”家族（下） (06:38)

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词根：Ceed, cede, ced, cess = go

Access n. 入口，通道，途径

【ac加强意思 à 一直走 à 入口，通道，途径】

Ø There is Internet access in every room .

Ø Only students and faculty have free access to the library .

Ø We should make sure that everyone can gain access to

affordable and quality education.

ancestor n. 祖先

【an(ante) 在…之前 + cest 走+ or 人 – 在我们之前走的人 --- 祖先】

Concede v. 妥协，让步 ,认输 [con 全部 + cede 走 – 全部走了，不再坚持 à 妥协让步]

l  The presidential candidate conceded after losing the election .

l  concession speech.

à concession n. 妥协，认输，让步

precede v. 发生在…之前 [pre 预先 + cede 预先走，提前走à发生在…之前]

Ligthning always precedes thunder.

Precedence n. [ˈprɛsɪdəns, prɪˈsidns] 优先；优先权

l  If one thing takes precedence over another, it is regarded as more important than the other thing.

Ø  To many young people, having fun takes precedence over making money.

   Precedent n. [ˈprɛsɪdənt] 先例

              set a precedent for 为…开了先例，开先河

Ø   The trial could set an important precedent for dealing with large numbers of similar cases. 

   Unprecedented adj. 史无前例的

l  The power of internet is unprecedented.

Apple achieved an unprecedented success after Steve Jobs's return as the CEO