callbacks是callback的复数
callback
美 ['kɔl.bæk] 
英 ['kɔːlbæk] 
- n.产品收回;重返
 - 网络回调事件;回调技术;回调方法
 
复数:callbacks  
n.  | 1. 产品收回 2. 重返  | 
n.  | 1. a telephone call made back to somebody who has recently phoned 2. an act of asking somebody to return, especially for a second audition 3. the recalling of a faulty product by a manufacturer 4. a system in which a remote computer calls back the computer that has just called its number when trying to connect to the Internet, so that only the correct person can use the Internet 1. a telephone call made back to somebody who has recently phoned 2. an act of asking somebody to return, especially for a second audition 3. the recalling of a faulty product by a manufacturer 4. a system in which a remote computer calls back the computer that has just called its number when trying to connect to the Internet, so that only the correct person can use the Internet  |