And anything in between from vocal strain, to scythes, scars on the vocal fold, polyps, and get the best out of the voice again following surgery.

• 这时他们必须学着克服各种发声困难，比如发声疲劳、手术造成的声襞上的伤口以及息肉等问题，从而在术后成功地恢复声音。