1、每日一句长难句（30）

The goal of all will be to try to explain to a confused and often unenlightened citizenry that there are not two equally valid scientific theories for the origin and evolution of universe and life.

2、【分析】

该句的主干是The goal … will be to try to explain...，explain后接的是双宾语，即explain to sb. sth.，直接宾语是that引导的从句。该从句的主干是there are not two theories for...，其中origin和evolution，universe和life都是and连接的并列名词。

3、【词汇】

unenlightened adj. 无知的，不文明的

valid adj.有效的

evolution n. 进化，发展

4、【译文】
所有（这些书）的目的是试图告诉那些迷惑不解且常常头脑不开化的普通百姓：就宇宙和生命的起源与发展问题而言，不可能存在两种同样成立的科学理论。

5、【明日长难句】
While warnings are often appropriate and necessary — the dangers of drug interactions, for example—and many are required by state or federal regulations, it isn't clear that they actually protect the manufacturers and sellers from liability if a customer is injured.