The rhyme is mo/cho/ko/ko/ro; tones match and parallel expression occurs in the second and third couplets.
Your bony frame sticks out of a mangy hide;
you share one feeding trough with the old horse.
Past merits when you dragged the cart through the rough plain
are distant memories.
Pleasurable days spent with the cowherd among green hills
are but old dreams.
The plough you dragged sits idly in the vegetable patch.
The cruel whip can barely get you up the hill.
How sad! The bright moonlit night deepens
and you look back on a lifetime of useless labor.