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onbeat in How to Rap including Sean Price, Mighty Casey, Zion I, Vinnie Paz, Fredro Starr, Del The Funky Homosapien, Tech N9ne, People Under The Stairs, Twista, BReal, Mr Lif, 2Mex, and Cage.[33] ? MCs stay onbeat by stressing syllables in time to the four beats of the musical backdrop.[6][34] Poetry scholar Derek Attridge describes how this works in his book Poetic Rhythm – “rap lyrics are written to be performed to an acpaniment that emphasizes the metrical structure of the verse”.[6] He says rap lyrics are made up of, “l(fā)ines with four stressed beats, separated by other syllables that may vary in number and may include other stressed syllables. The strong beat of the acpaniment coincides with the stressed beats of the verse, and the rapper anizes the rhythms of the intervening syllables to provide variety and surprise”.[6] 樣例文本 C ? IP多點廣播定義為一個去往主機群 IP數(shù)據(jù)的傳輸 ,有零個或多個主機組成的主機群通過單個 IP目的地址標(biāo)識。一個多點播送數(shù)據(jù)報被投遞給它的目的主機群的所有成員,具有和常規(guī)單路傳送 IP數(shù)據(jù)報同樣的“盡力”安全性,那就是說該數(shù)據(jù)報不保證達(dá)到目的地組的所有成員,或者不和其他數(shù)據(jù)報具有相同的順序。主機組的成員數(shù)是動態(tài)的;也就是說 ,主機隨時可以參加和離開組。 沒有對主機組中的成員的數(shù)目或地點加以限制 ,但是成員僅限于那些擁有專用的存取鍵的主機。一個主機可能同時是多個組的成員。一個主機即時不是一個組的成員也可以給它發(fā)送數(shù)據(jù)報。主機組可能永久性或暫時性的。永久性組具有一個眾所周知的,官方分配的 IP地址。它是