Complex sentence: An impassioned first theme enters on strings, while a melancholy second theme on bassoons and lower strings provides contrast, before the movement enters into the climactic development section, which finds space for a third theme, which eventually combines with motives from the first two themes.
Split into simpler sentences: An impassioned first theme enters on strings, while a melancholy second theme on bassoons and lower strings provides contrast. The climactic development section follows, finding space for a third theme, which eventually combines with the first two themes.