utility实用程序，公[应]用程序；应用；公用事业；(实用)工具；【修】实用性，应用性，通用性详细»
有效active;be good for;do good to;effective;have an influence upon;valid详细»
有效done work;hold true;was of avail详细»
有效availableness;be of avail;did good;did work;do good;efficacy;held true;hold true;usableness;validity详细»
有效am of avail;are of avail;did work;do good;do work;does work;done work;held good;held true;hold good;hold true;holds good;holds true;in effect;in force;is of avail;was of avail;were of avail详细»
有效〔名词〕effectiveness,significance详细»
有效am of avail;are of avail;did work;do good;do work;does work;done work;held good;held true;hold good;hold true;holds good;holds true;in effect;in force;is of avail;was of avail;were of avail详细»
有效am of avail;are of avail;availableness;did work;do good;do work;does work;done work;held good;held true;hold good;hold true;holds good;holds true;in effect;in force;validity;was of avail;were of avail详细»