单语范例（未经PONS编辑处理）
Blocking these four nerves desensitizes the foot, pastern, and entire fetlock joint, including the sesamoid bones.
en.wikipedia.org Fetlock boots are sometimes seen on the rear legs, primarily to prevent the horse from hitting itself on tight turns.
en.wikipedia.org They also perfected the art of running directly at cavalry to cut the horses in the bellies and fetlocks as they ran underneath them.
en.wikipedia.org This stresses the soft tissues that run under the fetlock because they are stretched longer.
en.wikipedia.org Some equines have them on all four fetlocks; others have few or no detectable ergots.
en.wikipedia.org