docs: modify functions  introduction
docs: modify functions  introduction

caicloud/cyclone,gaocegege/cyclone,constssk/cyclone,caicloud/cyclone,zjj2wry/cyclone,caicloud/cyclone,constssk/cyclone,zjj2wry/cyclone,constssk/cyclone,gaocegege/cyclone,caicloud/cyclone,zjj2wry/cyclone,constssk/cyclone,zjj2wry/cyclone,gaocegege/cyclone,gaocegege/cyclone