而且，同一个字内常见一重一轻的音节互换，少有二个非重音节互换。

In addition syllable metathesis within a word prefers the interchange between stressed syllable and an syllable.

youdao

音步：音步是诗歌韵律的一个单元，是一个重度音节和非重度音节的组合。

Foot: it is a rhythmic unit, a specific combination of stressed and unstressed syllables.

youdao

诗歌中通常的重读音节和非重读音节的排列模式。

A generally regular pattern of stressed and unstressed syllables in poetry.

youdao

Poetry is not interested in expert debate at all, and it converts the big spectrum of possible degrees of accent into those two simple categories: stressed and unstressed syllables.

诗是从不在乎这样专业的争议的，它将涵盖很多不同程度的重音的音谱,简单分成两种：,重音和非重音节。

耶鲁公开课 - 现代诗歌课程节选