He started with the lowest instruments and then goes to the high instruments and then back to low instruments at the end.

他开始使用声音最低的乐器,然后转向高音乐器,最后回到声音低沉的乐器

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

Is the beginning here played by the brasses or the strings?

这里的开始乐段是由哪种乐器演奏的,铜管乐器,还是弦乐器

耶鲁公开课 - 聆听音乐课程节选

In other words, what--or the woodwinds-- what family of instruments is playing here and is Tchaikovsky using a motive or is he using a theme at the very beginning of this concerto?

或者是木管乐器,换句话说,这里演奏的是什么乐器,还有柴可夫斯基在这首协奏曲的开始部分,运用了动机还是主题

耶鲁公开课 - 聆听音乐课程节选