Meter is something regular; it's a fixed scheme; it's inflexible, as Frost conceives of it here.

节拍是有规律的东西，是固定的排列;,这里弗罗斯特构想的是它是不变的。

耶鲁公开课 - 现代诗歌课程节选

Remember we were talking about beat, which is the regular pulse, the pulse of life, the pulse of music, that comes at regular intervals.

我们讲到了节拍,节拍是一种有规律的律动,就像生命的律动一样,这是音乐的律动,节拍表现为有规律的间隔

耶鲁公开课 - 聆听音乐课程节选