询问一个老题的 平行问题

waterblue01

Some bat caves, like honeybee hives, have residents that take on different duties such as defending the entrance, acting as sentinels and to sound a warning at the approach of danger, and scouting outside the cave for new food and roosting sites.   
A. acting as sentinels and to sound    
B. acting as sentinels and sounding    
C. to act as sentinels and sound    
D. to act as sentinels and to sound    
E. to act as a sentinel sounding

答案选B
解释是说 这是 A+B+C 的大平行，其中 B 是一个小平行。
但是翻译的话我怎么觉得是一个A+B的大平行，其中有一个小平行修饰A呢？要不然翻译出来不平行呀。
不同的职责有 防守入口1，扮演守卫并在危险临近的时候发出警告2，以及为新的食物和巢穴地址而在洞外巡逻3.
怎么都觉得第二部分是第一部分的说明，或者说两者有交集呀。如果说守卫不仅限于防守入口，那么1算不算是2的一部分而不能平行呢。

waterblue01

顶一下。。

maggie303

这题我也错了，选的C，我只能告诉自己别想太多了

HARVARD0728

acting and sounding are parallel to each other and modify "defending the entrance". How do the residents defend the entrance? acting as sentinels and sounding a warning at the approach of danger.

这是我在网上搜的。说sound 和 acｔ　是并列关系。有两级平行关系，第一级是ｄｅｆｅｎｄｉｎｇ　ａｎｄ　ｓｃｏｕｔｉｎｇ,　第二级如上。

waterblue01

HARVARD0728 发表于 2014-2-24 14:44
acting and sounding are parallel to each other and modify "defending the entrance". How do the resid ...

恩，是的，你说的就是其中的小平行的意思。：）