A mantra is something that you would just repeat over and over, for example, the syllable that everyone seems to be familiar with and popular one like Om, you can say Om over and over.

曼怛罗就是咒语,你一遍遍重复的内容，比如，大家都熟悉的音节,或唵这种众所周知的，你可以重复念唵音。

普林斯顿公开课 - 人性课程节选

It's just a little meditation technique, I know that I heard all music as a part of a larger mantra in Buddhism.

其实只是一些冥想的技巧，据我所知，佛教认为一切音律,都从属一个范围更广的咒语。

普林斯顿公开课 - 人性课程节选

The soldier becomes, in fantasy here, the spectator, as the war turns around and comes back, reversed by a kind of evil charm or spell, coming home.

在想象中这名士兵成为了旁观者，在战争转回再次回来的时候，被一种邪恶的咒语推翻，再次回来。

耶鲁公开课 - 现代诗歌课程节选