1. 伸展的：prototype theory 原型说 | protracted 伸展的 | protractor 牵引肌

2. 拖延的：protract 延长 | protracted 拖延的 | protractile 伸出的

3. 延长的：Sticking point:症结 | Protracted:延长的 | Bloodthirsty:残忍的

4. 拖延的,延长的：. Sticking point:关键,症结 | . Protracted: 拖延的,延长的 | . Recess: 休会;暂时中断

1. 延长的；拖延的；持久的
    Something, usually something unpleasant, that is protracted lasts a long time, especially longer than usual or longer than you hoped.

    e.g. After protracted negotiations, Ogden got the deal he wanted...
           经过长时间的谈判，奥格登得到了他想要的那笔生意。
    e.g. ...a protracted civil war...
           持久的内战

1. relatively long in duration
    tediously protracted

    e.g. a drawn-out argument
           an extended discussion
           a lengthy visit from her mother-in-law
           a prolonged and bitter struggle
           protracted negotiations

    Synonym: drawn-outextendedlengthyprolonged