这是个什么程序?RETAIN PROGRAM.不太明白：）DESCRIBE THE RETAIN PROGRAM OUTLINING THE SAMPLE FREQUENCY AND LENGTH OF TIME SAMPLES ARE RETAINED

这是个什么程序?RETAIN PROGRAM.不太明白：）DESCRIBE THE RETAIN PROGRAM OUTLINING THE SAMPLE FREQUENCY AND LENGTH OF TIME SAMPLES ARE RETAINED retain maintain和retain 有什么区别 求解,Object_c的retain机制是什么,retain count又是怎么搞的,请写一个小程序说明一下,谢谢 retain是什么意思 employ retain 的区别 retain receipt for returns retain variable是什么 Smile And Retain Smile keep,remain和retain的区别书上写的注释都是保持,保留.这三个词用法有什么区别? -·Smile and retain smile. 什么叫翻译程序? 程序什么然 成语 单词的辨析retain,remain,maintain,stayretain,remain,maintain,stay的区别是什么?各有什么侧重点?1楼回答的不太明显，还有什么答案呢？ I need time____before I can make the decision whether to accept his offer or not.convert reflect retain distinguish选什么为什么?. PROGR.SECUR.BTE.VIT 请大侠帮忙翻译 ,retain的同义词及其造句是? retain和remain的区别是什么?