Flex（4.0）滚动字幕，底部文字显示不全的问题

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    <?xml version="1.0" encoding="utf-8"?>      <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"                      creationComplete="complete()" >          <fx:Script>              <![CDATA[                 private function complete():void                 {                     move_up.xFrom = ca.width - 6;   //加6减6是为了首尾连接更加自然"                     move_up.xTo = 0 - description.width - 80; //这里加多少减多少视具体情况而定                    move_up.repeatCount = 0; //循环                     move_up.repeatDelay = 0; //循环间隔时间                     move_up.duration = 10000; //滚动一次的时间，单位毫秒                     move_up.play();                 }                                  private function move_pause():void                 {                     move_up.pause();                 }                                  private function move_resume():void                 {                     move_up.resume();                }             ]]>          </fx:Script>     <fx:Declarations>        <mx:Move id="move_up" target="{description}" />     </fx:Declarations>       <skin:CustomPanel width="100%" height="100%" title="西城区停车场简介" textAlign="center"  minHeight="10"  fontSize="16" skinClass="skin.CustomPanelSkin" dropShadowVisible="false" borderColor="#99bbe8"  fontFamily="仿宋"  fontWeight="bold">            <mx:Canvas id="ca" width="100%" height="100%" left="0" top="0"                        horizontalScrollPolicy="off" verticalScrollPolicy="off" mouseOver="move_pause()" mouseOut="move_resume()>                <mx:Label id="description"  horizontalCenter="0" text="{textStr}" width="100%" height="120%"> //如果textStr过长，120%是解决底部文字显示不全的问题                </mx:Label>              </mx:Canvas>    </skin:CustomPanel>     </mx:Application>
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