Musical Analysis: Bernstein on Brahms, Symphony No. 4, Op. 98, 1st Movement - Brahms: Musical Analysis: Bernstein on Brahms, Symphony No. 4, Op. 98, 1st Movement: II. "Our Journey Begins Without Introduction..." (音乐分析：伯恩斯坦指挥，第4号交响曲，作品98 - 第2首 “我们的旅程开始时没有引子……”)