When an entry is deleted, it leaves an empty hole in the file.
删除一个条目时，会在文件内留下一个空洞。
2
The line cannot be deleted as the data entry screen automatically displays all accounts for the selected form that are defined to hold historical rates.
这行不能删除的原因是：数据输入屏幕自动显示定义来持有历史汇率的已选表单的所有账户。
3
Both these operations require the user to retrieve the worksheet entry to be modified or deleted, make changes to the entry as required, and then transmit it back to the server for execution.