flash打飞机游戏的代码，高手能帮我注释一下吗?谢谢

package classes
{ import flash.display.MovieClip
public class EnemyExplode extends MovieClip
{
public function EnemyExplode(enemyX:Number,enemyY:Number):void
{
x=enemyX;
y=enemyY;
}
}
}

AS3.0的

package classes //包路径
{ import flash.display.MovieClip//导入MovieClip类
public class EnemyExplode extends MovieClip//定义类并继承MovieClip类
{
public function EnemyExplode(enemyX:Number,enemyY:Number):void//构造函数，代两个参数
{
x=enemyX;//传值给坐标
y=enemyY;
}
}
}