GAP是什么意思啊

单词：
gap
n.（名词）
1. An opening in a solid structure or surface; a cleft or breach:
豁口，裂缝：坚固建筑物或表面的开口；裂缝或缺口：
wriggled through a gap in the fence; a large gap in the wall where the artillery shell had exploded.
从篱笆间的缺口处穿过；炮弹片在墙上炸的大豁口
2. A break in a line of defense.
防线缺口
3. An opening through mountains; a pass.
山凹，隘口：山脉中的开口；通道
4. A space between objects or points; an aperture:
空隙，缝隙：物体或位置的间隔；空隙：
a gap between his front teeth.
他的门牙间的空隙
5. An interruption of continuity:
中断：连续性的中断：
a nine-minute gap in the recorded conversation; needed to fill in the gaps in her knowledge.
录音谈话中有九分钟的中断；需要填补她在知识上的不足
6. A conspicuous difference or imbalance; a disparity:
差距，悬殊：明显的不同或不平衡；差异：
a gap between revenue and spending; the widening gap between rich and poor.
收入和消费之间的差距；富人与穷人之间很大的悬殊
7. A problematic situation resulting from such a disparity:
差异所造成的困难状况：
the budget gap; the tech