Sentence:  Dominant stress is of course more than extended duration , and normally centers on syllables that would have primary stress or phrase <WSD>stress</WSD> if the words or longer units they are parts of were spoken alone : a dominant stress given to glorify would normally center on its first syllable rather than its last . 
Meaning of the word marked with <WSD> tags:  the relative prominence of a syllable or musical note (especially with regard to stress or pitch)