shave something off/from something
phrasal verb with shave verb [ I or T ] uk/ʃeɪv/ us/ʃeɪv/
从…刨掉，自…削掉（薄薄的一层）
to cut a very thin piece from an object or surface
She shaved a few millimetres off the bottom of the door, so that it would open more easily. 她把门的底部刨掉了几毫米，这样开门就容易些了。