n. a person who evokes boredomn. diameter of a tube or gun barreln. a hole or passage made by a drill; usually made for exploratory purposesv. cause to be bored
n. 令人讨厌的人, 激浪, 枪膛, 孔vt. 使烦扰, 钻孔vi. 钻孔bear的过去式[计] 内径; 孔径