不完全佩戴在听者身上的助听设备: hearing aid equipment not entirely worn on the listener
差距: 1.(差别程度) gap; disparity 短语和例子弥合差距 bridge [fill up; close] the gap; 缩小 ... 与 ... 两者间的差距 narrow the gap between ...; 对双方合作的问题, 两位政治家各自所持的看法差距甚大。 there was a wide gap between the views of the