overlap
/ˌəuvəˈlæp; ˌovɚ`læp/ v
(-pp-) [I, Tn]
1 partly cover (sth) by extending over its edge （与某物）部分重叠
a boat made of overlapping boards 用鱼鳞板材造的船
The tiles on the roof overlap one another. 房上的瓦是一块搭著一块的.
2 (fig 比喻) partly coincide (with sth) 部分（和某事物）巧合、 一致
Our visits to the town overlapped. 我们彼此都恰巧到那小城观光.
His duties and mine overlap, ie cover part of the same area of interest. 他的职责和我的有部分重叠.
overlap / ˈəuvəlæp; `ovɚˌlæp/ n
1 [C] overlapping part or amount 重叠的部分或程度
an overlap of 50 cm 50厘米的重叠部分
a large overlap 大部分重合.
2 [U] fact or process of overlapping 重叠; 重合; 重复
There is no question of overlap between the two courses. 这两门课程之间不存在重叠的问题. =>illus 见插图.