n a conspicuous disparity or difference as between two figures
n an open or empty space in or between things
n a narrow opening
n a pass between mountain peaks
n a difference (especially an unfortunate difference) between two opinions or two views or two situations
n an act of delaying or interrupting the continuity
v make an opening or gap in
n. 差异, 缺口；缝隙（gap的复数形式）