Complex sentence: It opens with rhythmic percussion, and the lower strings for four bars (playing'eighth note ‒ sixteenth note ‒ sixteenth note' figures), before the violin boldly enters with the first theme on the G string.
Split into simpler sentences: It opens with four bars of rhythmic percussion, with the lower strings playing'eighth note ‒ sixteenth note ‒ sixteenth note' figures. The violin boldly enters with the first theme on the G string.