...will have a primary stress, and a word with three or more syllables might have a secondary stress. Some words and expressions might change as their stresses...
...了 Many commentators settle on a three-level distinction between primary stress,secondary stress and unstress, as seen in the following example. 很多...
(一)所謂的驚嘆號 [ 圖片參考：http://tw.yimg.com/i/tw/dictionary/pic/054.gif ]：次重音 (secondary stress)