12月英语六级阅读长难句分析100例-sentence 91

　　While warnings are often appropriate and necessary--the dangers of drug interactions, for example--and many are required by state or federal regulations, it isnt clear that they actually protect the manufacturers and sellers from liability if a customer is injured.

　　【词汇突破】appropriate：恰当的，合适的

　　liability：责任(duty，obligation,commitment 的同义替换词)

　　【主干识别】it isnt clear that +主语从句(it 为形式主语)

　　【其他成分】while warnings are often approprite and necessary and many are required by state or federal regulations让步状语从句;the dangers of drug interactions, for example.插入语;that they actually protect the manufacturers and sellers from liability宾语从句;if a customer is injured条件状语从句。

　　【微观解析】由while引导的时间状语从句中，大的并列可还原为while warnings are oftenand many warnings are required

　　【难点揭秘】各种从句交织在一起会导致主干模糊，其中也包括出现插入语的现象

　　【译文赏析】尽管警告常常是适当而且必须的--比如对于药物相互作用的危险提出警告--许多警告还是按州或联邦政府规定要求给出的，然而 并不清楚，如果顾客受到伤害时，这些警告其实是在使其生产者和销售者豁免责任。