1. Bit by bit she closed the gap.
    她一点一点地缩短了距离。

2. The work fills in a gap which hitherto existed in our archaeological literature.
    这一著作填补了我国考古学文献中的一个空白。

3. After entering the narrow gap on the plateau, they climbed down the steep sides of the cave until they came to a narrow corridor.
    他们从高原上的窄缝进去，顺着笔直陡峭的洞壁往下爬。

4. I am able to reach out to others and bridge the gap between my language and culture and theirs.
    我能与人交流，并能够弥合我所说的语言和所处的文化与他们的语言和文化之间的鸿沟。