可以缺省地使用光标和退格键来移动和编辑输入行，就象在Bashshell中一样。
By default you can use the cursor keys, and backspace, to move around and edit the input line, just like with the Bash shell.
当用户输入错误时，可以按退格键“撤销”错误的字符。
When a user mistypes, the Backspace key "undoes" the erroneous characters.
退格符延迟大约持续0.05秒。如果OFILL设定了，则传送一个填充字符。
Backspace delay lasts about0.05 seconds. If OFILL is set, one fill character is transmitted.
不过经验告诉我们，退格键不会那样。
Experience tells us that Backspace does nothing of the sort.
我看过HTML表单，光标从一个输入字段自动移动到另一个输入字段，并使用退格键移动到上一个字段。
I have seen HTML forms whereby the cursor moves from one input field to another automatically and USES backspace to move to the previous field.
一行行的字被敲打出来，又被一次次地用退格删去。因为，我真的不知道该如何诉说……
Lines of words flowing out, but were deleted once and once again. Because, I actually don't know how to tell the stories.
一行行的字被敲打出来，又被一次次地用退格删去。因为，我真的不知道该如何诉说……
Lines of words flowing out, but were deleted once and once again. Because, I actually don't know how to tell the stories.
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