WPF,卡通片的Seek方法到底是啥意思

WPF,动画的Seek方法到底是啥意思?
Storyboard.Seek 方法:MSDN
对于动画的这个Seek方法,简直读不懂是什么意思?下面有一个示例:

<Window x:Class="WPF3.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:WPF3"
        Title="MainWindow" Height="350" Width="525">
    <Window.Resources>
        <Storyboard x:Key="storyboard">
            <DoubleAnimation Storyboard.TargetProperty="Width" To="450" Duration="0:0:10" />
        </Storyboard>
    </Window.Resources>
    <Grid Height="181" Name="grid1" Width="332" Column="1">
        <Button Name="button1" Content="Button" Height="23" HorizontalAlignment="Center" VerticalAlignment="Center" Width="75" Click="button1_Click"/>
        <Button Name="button2" Content="Button" HorizontalAlignment="Left" Margin="128,144,0,0" VerticalAlignment="Top" Width="76" Click="button2_Click"/>
    </Grid>
</Window>



public MainWindow()
{
    InitializeComponent();
    Loaded += MainWindow_Loaded;
}
Storyboard storyboard;
void MainWindow_Loaded(object sender, RoutedEventArgs e)
{
    storyboard = FindResource("storyboard") as Storyboard;
}
private void button2_Click(object sender, RoutedEventArgs e)
{
    storyboard.Seek(TimeSpan.FromSeconds(60));
}

private void button1_Click(object sender, RoutedEventArgs e)
{
    storyboard.Begin(button1,true);
}


上面的示例中,有一个执行10秒钟的动画,单击button1i,动画开始在button1上启动,在动画执行的期间,单击button2,看不出有什么情况发生啊,请问,Storyboard.Seek 方法到底起啥作用呢?
------解决方案--------------------
WPF,卡通片的Seek方法到底是啥意思
你就理解成快进到某个时间点吧