vt.
咬，啮，啃：
The dog was
gnawing a bone.
狗在啃骨头。
咬成，咬断，咬坏：
to gnaw a hole
咬成个洞
消耗；腐蚀；侵蚀；损坏；磨损：
The acid gnaws the metal.
酸腐蚀金属。
折磨，使痛苦；使苦恼，使烦恼；困扰：
Fear and anxiety were gnawing her.
恐惧与焦虑折磨着她。
vi.
(反复不断地)咬啮，啃(与 on， away， at 等连用)：
The dog has been gnawing awa