unstressed syllable的用法和樣例：
例句
- A metrical foot consisting of a stressed syllable followed by an unstressed syllable, as in season, or of a long syllable followed by a short syllable.
揚抑格音步兩個(gè)音節的音步，其中第一個(gè)音節重讀，第二個(gè)音節不重讀，如在單詞season中，或第一個(gè)音節是長(cháng)的，第二個(gè)音節是短的 - An unstressed syllable in a word.
一個(gè)單詞中一個(gè)不予重讀的音節
