2014年秋高中英语 Module 2 A Job Worth Doing 同步攻课讲解外研版必修5
一、 One road in particular, which goes north f rom La Paz, is considered the most dangerous road in the world.
A）句子中in particular表示“特别是；特别地”，相当于副词particularly, 英语中一些介词短语相当于一个副词的作用，类似的还有：in total=totally 总共地，总地来说，in general=generally 大体来说，一般来说，in order=orde rly，整齐地，井然有序地，in brief=briefly 简洁地（说），简而言之等。
B）句子中is considered the most dangerous road...是由 “consider sb. / st h. （+ to be） + 形容词或名词”转化而来的被动语态形式；复合宾语结构“think / believe / consider sb. / sth. （+ to be） + 形容词或名词”可用主动形式也可用被动形式。如：
They think his invention (to be) very valuable.
David believed what she said to be a good way to solve the problem.
二、 Although there is not a lot of traffic, on average, one vehicle comes off the road every two weeks.
句子中traffic相当于vehicles and passengers，通常用作不可数名词；every two weeks说明事情发生的频率，“每两周一次”，相当于once in two weeks。如：
Big earthquakes usually happen every three or four years in this area.
