Smarty：如何引用关联数组索引

Array $imagelist:

Array ( 
    [additional] => Array ( 
        [count] => 2 
        [image] => Array ( 
            [nokia_e61_1.jpg] => Array ( 
                [name_body] => nokia_e61_1 
                [name_ext] => jpg 
            ) 
            [nokia_e61_2.jpg] => Array ( 
                [name_body] => nokia_e61_2 
                [name_ext] => jpg 
            ) 
            [nokia_e61_3.jpg] => Array ( 
                [name_body] => nokia_e61_3 
                [name_ext] => jpg 
            ) 
            [nokia_e61_4.jpg] => Array ( 
                [name_body] => nokia_e61_4 
                [name_ext] => jpg 
            ) 
        ) 
    ) 
    [main] => nokia_e61 
) 

该值保存在 中。nokia_e61_1.jpg{$getvars.imagename}

我写了，但它不起作用。{$imagelist.additional.image.`$getvars.imagename`.name_body}

请帮忙。