a sufficiency of的用法和样例：
- There was not a sufficiency of chivalry in Hurry to induce him to hazard the safety of his own person.
- The system of ventilation shall be controlled so as to maintain theair in a satisfactory co ndition and to ensure a sufficiency of airmovement in all conditions of weather and climate.
- Our country has sufficiency of natural resources.
- He questioned the sufficiency of human intelligence.
- One can qualify for the hall of fame by murdering sufficient people in a sufficiently interesting way.