a horn of abundance的用法和样例：
- You cannot make a horn of a pig's tail.
- Horn of a bull, hoof of a horse, smile of a Saxon.
- His sole concern was his rickshaw. This could provide griddle cakes and all sorb of food; it was a horn of plenty which followed him meekly around.
- Having a horn or horns or hornlike parts or horns of a particular kind.