duienginelicensethemitlicense(mit)copyright(c)<year><copyrightholders>

permissionisherebygranted，freeofcharge，toanypersonobtainingacopyofthissoftentationfiles(the“software“)，todealinthesoftwarewithoutrestriction，includingitationtherightstouse，copy，modify，merge，publish，distribute，sublicense，and/orsellcopiesofthesoftthesoftwareisfurnishedtodoso，subjecttothefollowingconditions:

theabovecopyrightnoticeandthispermissionnoticeshallbeincludedinallcopiesorsubstantialportionsofthesoftware.

thesoftwareisprovided“asis“，itedtotheerchantability，fitnessforaparticularpurposeandnonieauthorsorcopyrightholdersbeliableforanyclaim，damagesorotherliability，whetherinanactionofcontract，tortorother，outoforinconnectionwiththesoftwareortheuseorotherdealingsinthesoftware.

duienginelicensethemitlicense(mit)copyright(c)<year><copyrightholders>

permissionisherebygranted，freeofcharge，toanypersonobtainingacopyofthissoftentationfiles(the“software“)，todealinthesoftwarewithoutrestriction，includingitationtherightstouse，copy，modify，merge，publish，distribute，sublicense，and/orsellcopiesofthesoftthesoftwareisfurnishedtodoso，subjecttothefollowingconditions:

theabovecopyrightnoticeandthispermissionnoticeshallbeincludedinallcopiesorsubstantialportionsofealingsinealingsinthesoftware.

thesoftwareisprovided“asis“，itedtotheerchantability，fitnessforaparticularpurposeandnonieauthorsorcopyrightholdersbeliableforanyclaim，damagesorotherliability，whetherinanactionofcontract，tortorother，outoforinconnectionwiththesoftwareortheuseorotherdealingsinsoftwareisfurnishedtodoso，subjecttothefollowingconditions:

theabovecopyrightnoticeandthispermissionnoticeshallbeincludedinallcopiesorsubstantialportionsofealingsinthesoftware.

thesoftwareisprovided“asis“，itedtotheerchantability，fitnessforaparticularpurposeandnonieauthorsorcopyrightholdersbeliableforanyclaim，damagesorotherliability，whetherinanactionofcontract，tortorother，outoforinconnectionwiththesoftwareortheuseorotherdealingsinthesoftware.(未完待续。)