重点讲解：
1. hold sb. captive/be held captive
俘虏；扣押；关押；
eg. Rebels in Liberia have released four foreigners after holding them captive for a week.
利比里亚的叛乱分子释放了4名被扣押了一个星期的外国人R.m&LNXsmx-(rA_CF5t。
eg. They were held captive by masked gunmen.
他们被蒙面的持枪歹徒劫持了=kihvylPfac)=。
2. be able to do sth.
（因具有品质或技能）能做到…的；
eg. He conjectured that some individuals may be able to detect major calamities.
他猜测说有些人也许能够察觉重大灾难SLD%q)=ij)+WITcz。
eg. We were not able to meet the deadline because of manufacturing delays.
因为制造方面的延误，我们没能赶上最后期限B).G^o0dcl。
3. attempt to do sth.
尝试，试图（尤指做困难的事）；
eg. He didn't attempt to answer.
他没有试图去回答这些问题52QhNrzN3Bf9b@S#_f。
eg. We can attempt to repair it.
我们可以试着修复它了gRRlf_R]N7Ft~!。