If a range of only one row is selected, the contents of the far left cell is copied to all the other selected cells. If you have selected several rows, each of the far left cells is copied into those cells to the right.
如果选定的区域只有一行，则最左边单元格的内容将被复制到选定的其他所有单元格。如果选定的区域有多行，则各个单元格行中最左边单元格的内容将被复制到右边的单元格。