[kòng bái]
blank space; gap; margin
leave a space between lines;
行與行之間留出空白
leave a margin on the left hand side of the page;
在左邊留空白
a blank in one's memory;
記憶中的空白
The work fills (in) a gap which has hitherto existed in our archaeological literature.
這部著作填補了我國考古學文獻中的一個空白。