【经】 invalid vourcher
be of no effect; invalidity; impotence; inefficacy; nullification; nullity
【计】 IDL; ineffectiveness
【医】 inefficacy
【经】 inefficiency; null and void
guarantee; assure; certify; warrant; ensure; pledge; secure; assurance
guaranty; surety; warranty
【经】 assurance; endorsement; guarantee; guaranty; recognizance; scure
secure; security; surely
