Dì sān yuèzhāng shì zhěng bù zuòpǐn zhōng zuì dòng rén de bùfen.
The third movement is the most moving part of the entire work.
Tips
memory
乐 (music) + 章 (chapter/section) = a chapter of music. The same 章 appears in 文章 (article/essay) and 章节 (chapter), making 乐章 intuitive: a musical 'chapter'.