《《《《《《《《内容已删除》》》》》》》》》
modification1original-document
modification1original-document
modification1original-document
例句：
1
Hitting
undo
twice
would
cause the
document
to look
like
this
:
(
modification1 original
-
document
)
.
执行
两
次
撤消
操作
后
文档
将
如下
所
示
：
（
modification1original-document
）
。
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's
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modification1original-documentmodification1original-documentmodification1original-document