If a user mistypes something, then enters an unrelated function such as paragraph reformatting, then presses the Backspace key repeatedly, the mistyped characters are erased and the reformatting operation is ignored.

• 如果在用户错误输入之后，又执行了一个不相关的操作。 如重新设置段落格式，接着反复地按退格键。 错误输入的字符被删除，而段落格式设置会跳过去。