Musical Analysis: Bernstein on Tchaikovsky's Symphony No. 6, Op. 74 "Pathétique" - Tchaikovsky: Musical Analysis: Bernstein on Tchaikovsky's Symphony No. 6, Op. 74 "Pathétique": I. "Now There Is A Melody, A Pure Orchestral Song..." (1st Movt.) (音乐分析：伯恩斯坦指挥，第6号交响曲，作品74“悲怆” - 第1首 “现在有一首旋律，一首纯粹的管弦乐曲……”（第一乐章）)