[kòng bái]
blank space; gap; margin
leave a space between lines;
行与行之间留出空白
leave a margin on the left hand side of the page;
在左边留空白
a blank in one's memory;
记忆中的空白
The work fills (in) a gap which has hitherto existed in our archaeological literature.
这部著作填补了我国考古学文献中的一个空白。