✔ 最佳答案
"He transforms his appearance." and "He alters his appearance."
There are three main differences:
(1) "He transforms his appearance" means [he changes his appearance into something that looks completely or substantially different from before]； "He alters his appearance" means [he changes his appearance] 。
(2) "transforms" means a change in "look" alone, or both in "look" and in "form", such as transforms from human into a ghost, or a monster, a bird, etc.；"alters" only means a change in "look", such as changing the appearance to look older, younger, or look like somebody else, or even from a woman to a man etc., but still remains human.
(3) "Transforms" usually involves either a change via natural growth, magical or spiritual power. "Alters" usually involves disguises, cosmetic changes, or surgical changes.
