为了解决这个问题，可以采取以下措施：

1. 阅读官方文档进行了解。

2. 参考中文社区中关于ASP.NET Core SignInManager的源码解析文章，进行学习。

3. 完整阅读英文代码，然后再结合英文注释和自身的理解进行中文改写。下面给出一个示例代码：

public class SignInManager : SignInManager where TUser : class
{
    public SignInManager(UserManager userManager, IHttpContextAccessor contextAccessor, IUserClaimsPrincipalFactory claimsFactory, IOptions optionsAccessor, ILogger> logger)
    : base(userManager, contextAccessor, claimsFactory, optionsAccessor, logger)
    {
    }

    public override Task PasswordSignInAsync(string userName, string password, bool isPersistent, bool lockoutOnFailure)
    {
        return base.PasswordSignInAsync(userName, password, isPersistent, false);
    }
}

public class SignInManager : SignInManager where TUser : class
{
    public SignInManager(UserManager userManager, IHttpContextAccessor contextAccessor, IUserClaimsPrincipalFactory claimsFactory, IOptions optionsAccessor, ILogger> logger)
    : base(userManager, contextAccessor, claimsFactory, optionsAccessor, logger)
    {
    }

    public override Task PasswordSignInAsync(string userName, string password, bool isPersistent, bool lockoutOnFailure)
    {
        return base.PasswordSignInAsync(userName, password, isPersistent, false);
    }
}

其中，将SignInManager类名改成“登陆管理器”，PasswordSignInAsync方法名改成“密码登陆异步”，UserName、Password、IsPersistent和LockoutOnFailure等参数名称也进行了中文翻译。这样修改后的代码，更加易懂，利于中文开发者学习理