问题描述：
what we need is the
1.a turtle on line.
2.what we need is the end.
白痴得问问这两句啥意思,麻烦准确点,
1.a turtle on line.
2.what we need is the end.
白痴得问问这两句啥意思,麻烦准确点,
问题解答：
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