我遇到了这个我无法理解的 ActionScript 片段。有谁能够帮我？特别是这一行：
(((_local3 >>> _local2[((_arg1 + 1) + ((_local4 - (_local4 % 3)) / 3))]) & 0xFF) ^ (_local2[_arg1] ^ 13592211)).writeByte(!null!);
整体功能：
public function _StrPool170(_arg1:int):string{
var _local2:* = new array(13592197, 2171943, 3679800, 2570278, 13592202, 7370616, 3374196, 13592216, 8355402, 7955555, 2830635, 6842988, 6447188, 3761774, 721203, 13592222, 7957577, 3616104, 2963757, 7958082, 4013869, 474940, 13592223, 6055787, 7043424, 8348261, 2897452, 7299657, 6908003, 4983814, 13592216, 6710339, 3222382, 6319147, 8283995, 6644332, 6825336, 747108, 13592203, 7765363, 2105456, 2693170, 13592198, 8089726, 2960765, 8025659, 1381752, 13592199, 6387064, 8025452, 8075900, 1340262, 13592221, 7169858, 8216683, 3419755, 7038254, 3565152, 918582, 13592202, 8024180, 3372641, 13592196, 7634554, 3766383, 1536634, 13592193, 8158079, 8156027, 7831419, 8220988, 3281535, 13592198, 8158565, 2960760, 8025659, 1381752, 13592192, 8026979, 8155518, 4028540, 8289392, 13592197, 8355430, 7828091, 3962722, 13592192, 8026979, 7501694, 4026983, 8289392, 13592199, 8223844, 8092025, 7896438, 1326705, 13592194, 7895393, 8289404, 8222835, 7487348, 1145982, 13592223, 6644860, 6447969, 6448480, 6515305, 6388094, 6516514, 4983905, 13592198, 6781541, 2960763, 7371579, 1381729, 13592203, 6977384, 2171254, 2693170, 13592198, 6781541, 2894971, 7371579, 1381729, 13592193, 6448993, 6447223, 8354682, 8220988, 3281535);
var _local3:* = new ByteArray();
if (!false) {
var _local4:* = 0;
(((_local3 >>> _local2[((_arg1 + 1) + ((_local4 - (_local4 % 3)) / 3))]) & 0xFF) ^ (_local2[_arg1] ^ 13592211)).writeByte(!null!);
};
_local4++;
return ((_local2[_arg1] ^ 13592211));
}