汤姆用传统的弦乐器来演奏。

Tom plays a traditional string instrument.

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弦乐器的演奏者练习的则是在左手的手指上下滑动的同时，用右手前后拉动琴弓——两个截然不同的动作。

String players practice moving the fingers of the left hand up and down, while drawing the bow to and fro with the right arm — two entirely different movements.

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每一个专家都有一个关于蒙眼测试的故事。在蒙眼测试中，参加测试者不见乐器只闻其声，靠听力辨别哪是用斯特拉·瓦迪演奏，哪是用现代小提琴演奏。

Every expert has a story about a "blind" test in which several instruments are played out of sight and the listeners have to guess which is the Strad and which the modern pretender.

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And the first question I think that you have on the quiz here is the following: what keyboard instrument is playing here?

这里有个小测验,第一个问题是,这段音乐是用什么键盘乐器演奏的

耶鲁公开课 - 聆听音乐课程节选

It starts with low instruments and then moves to higher ones, and then back to low ones.

开始用低音乐器演奏低音,然后转向更高的,最后回归到低音

耶鲁公开课 - 聆听音乐课程节选