Here's a group of sounds, different pitches and actually three different pitches in there, as opposed to just one pitch--one pitch, three pitches or three or four pitches, moving in different ways, kind of independent rhythmic chords, so that's the difference between monophonic, homophonic and polyphonic texture.

这是一组音,不同的音高,事实上三个不同的音高,相对于一个音高,一个音高,三个音高或四个音高,以不同方式运动,像有独立节奏的和弦,这就是单音,主音和复音织体的区别

耶鲁公开课 - 聆听音乐课程节选

We broke up into groups, and each group designed its own toy and made an alpha prototype.

我们分成几个小组，每一组独立设计，并制作出一个玩具模型。

气泡项目 - SpeakingMax英语口语达人