(My English is poor, so if you can understand Chinese, please read the Chinese version below)

Hello, I'm a Galaxy Nexus user.
I locked my phone with pattern, then i try to unlock my phone with wrong patterns, as a result my phone ask me to unlocked it with Google account, then i had try many times, but fails.
But I PROMISE WHAT I INPUTED IS CORRECT. It's because after i flash my phone into 4.0.4 with nexus factory image, I added this account to my phone, and i haven't change passwd since then.
Information inside the phone is important to me, I want to know how to unlock my phone, or how to backup my infomation.
Thanks.


你好，我是一名Galaxy Nexus用户。
刚才我用图案锁住了手机，然后无聊地在解锁界面乱按，结果尝试次数过多，让我用谷歌账户登录，我尝试了很多次都不成功。
但我肯定输入的账户和密码是正确的，因为我最近的一次刷机是刷4.0.4原厂镜像，一刷完就添加了这个账户，这个账户到现在也没有改过密码，账户和密码200%正确。
手机里面的资料对我很重要，我想知道如何顺利地解锁，或者让我备份手机里的内容。
谢谢。