We'll be talking about the fact that this is an interval of a third; it spans three letter names a little bit later on.

我们以后会谈到，这其实是个三度音程，它跨越了三个音名。

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We'll be talking about the fact that this is an interval of a third; it spans three letter names a little bit later on.

我们以后会谈到,这其实是个三度音程,它跨越了三个音名

耶鲁公开课 - 聆听音乐课程节选

Constructed by Sir William Arrol, it is supported by 1000 ton counterweights and comprises three double cantilevers held together with girder spans.

UNESCO: UK goes Forth at World Heritage Conference in Bonn

He might have taken the time to saddle the horse or hitched up three spans of mules to Concord stage-coach and smoked a pipe as it seems no one in that city was after him.

NPR: Excerpt: 'True Grit'