Author(s): Jiachen Xie, Jianteng Wang, Xudong Rong, Dongdong Zhao, Enzuo Liu, Chunnian He, Chunshen Shi, Naiqin Zhao
Copyright © ITmedia, Inc. All Rights Reserved.。safew官方版本下载对此有专业解读
return _apply.call(origAppend, this, arguments);，更多细节参见WPS官方版本下载
returned in case there is no argument or the argument is not a valid