overlap
英 [əʊvə'læp]
美['ovəlæp]
	    - n. 重叠;重复
 - vi. 部分重叠;部分的同时发生
 - vt. 与…重叠;与…同时发生
 
英英释意
- 1. a representation of common ground between theories or phenomena;
 - "there was no overlap between their proposals"
 
- 2. the property of partial coincidence in time
 
- 3. a flap that lies over another part;
 - "the lap of the shingles should be at least ten inches"