问Greensock GSAP在ajax for循环中动画化<li>

EN

success: function( json_data )
{
for( var i = 0; i < json_data.length; i++ )
{

// if user has no image sets default
if(json_data[i].author=="")
json_data[i].author ='http://lorempixel.com/250/250/'; 

console.log("jsonData: " , json_data[i]);

var rainingPhrase = $(".timeline-normal");
var tl = new TimelineLite();

var new_html = [

'<li class="timeline-normal" id="' + json_data[i].date +'"">',
'<div class="timeline-badge" style="background-image: url(' + json_data[i].author +' )">',
'</div>',
'<div class="timeline-date">',
'<time datetime="' + json_data[i].date + '"></time>',
'</div>',
'<div class="timeline-panel">',
'<a href="json_data[i].url">',
'<div class="popover left">',
'<div class="arrow"></div>',
'<h3 class="popover-title">' + json_data[i].title + '</h3>',
'<div class="popover-content">',
'<p><small>' + json_data[i].description +'</small></p>',
'</div>',
'</div>',
'</a>',
'</div>',
'</li>'
].join( '\n' );

jQuery('.get_more_topics').before( new_html );
jQuery('.get_more_topics').before( more_button );

/// HERE ARE THE LINES I NEED HELP WITH
tl.add(TweenLite.set(rainingPhrase, {bottom: 250}));
tl.add(TweenLite.to(rainingPhrase, 2, {bottom:5, ease: Bounce.easeOut}));

jQuery('#temp_loader').remove();
jQuery('.get_more_topics').show(); 
}

}