Log in or manage your profile, security, and practice data.
登录账号，或管理个人资料、登录安全与做题数据。
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Enter your email and we will send a 6-digit code. New users will also choose a unique username and display name.
输入邮箱后我们会发送 6 位验证码。首次注册还需设置唯一账号和公开昵称。
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Your email has been verified. A password is now required so you can return without requesting another email code. Until it is saved, only password setup and logout are available.
邮箱已经验证。现在必须设置密码，之后即可直接使用账号密码登录，无需每次获取邮件验证码。保存密码前只能设置密码或退出登录。
Posting, voting, account deletion, and other account changes are disabled. You may contact an administrator or submit an appeal below.
发帖、回复、投票、注销账号及其他账号修改功能已停用。您可以联系管理员或在下方申请解封。
Your identity and the destinations you use most.
查看账户身份和常用功能入口。
Manage your private background information, public display name, and login username.
管理私密背景资料、公开昵称以及用于登录的唯一账号。
Optional for community accounts. These details are visible only to you and authorized administrators. 普通社区账户可选填；这些资料仅您本人和获授权管理员可见。 Required for NextStep members: choose a person type and school; students must provide a grade. NextStep 成员必须填写身份和学校；学生必须填写年级。
Your username is unique and is used for password login. Uppercase letters are saved as lowercase.
账号具有唯一性，用于密码登录；大写字母会转为小写保存。
The time format applies to every time shown on this site, on this device.
时间格式将应用于本站所有时间显示（保存在本设备）。
Manage your password, active sessions, and saved practice history.
管理登录密码、设备会话和已保存的做题记录。
Passwords are stored as salted PBKDF2 hashes, never in plain text. Your linked email can also be used for verification-code login and password recovery.
密码使用加盐 PBKDF2 单向哈希存储，绝不保存明文。您也可以使用已绑定邮箱接收验证码登录或重设密码。
Passwords are stored as salted PBKDF2 hashes, never in plain text. This administrator account has no linked email, so keep the password secure.
密码使用加盐 PBKDF2 单向哈希存储，绝不保存明文。此管理员账号未绑定邮箱，请妥善保管密码。
End every active session, including this device.
结束所有设备上的登录状态，包括当前设备。
Remove synced progress and the cached history in this browser.
清除同步进度及当前浏览器里的缓存记录。
This permanently removes your login information and any linked email. Your forum posts remain, shown as “[deleted]”. This cannot be undone.
注销后登录信息及已绑定邮箱（如有）将被永久删除，论坛发言会保留并显示为“[deleted]”。此操作无法撤销。
Submit completed service for review and track your approved and signed-off hours.
提交已完成的义工服务以供审核，并查看获批和已兑现时长。
Enter completed time in quarter-hour increments. Each submission may include up to 24 hours.
请按 0.25 小时递增填写已完成时长，每次最多提交 24 小时。