We can use another form of variable expansion to select a specific substring, based on a specific character offset and length. Try typing in the following lines under bash.

可以根据特定字符偏移和长度，使用另一种形式的变量扩展，来选择特定子字符串。

youdao

Note that the split file named yaa did not finish with a newline character, so our prompt was offset after we used cat to display it.

注意，名为yaa的分解文件并未使用换行符表示结束，因此当使用cat显示提示之后，会发现提示出现了偏移。

youdao

Moves the active point to the given 1-based absolute character offset.

将活动点移动到给定的基于1的绝对字符偏移位置。

youdao