33．Odd though it sounds, cosmic inflation is a scientifically plausible consequence of some respected ideas in elementary-particle physics, and many astrophysicists have been convinced for the better part of a decade that it is true.
[句子主干]Odd though it sounds, cosmic inflation is…, and many astrophysicists have been convinced for…
[语法难点]
有倒装。该句的结构是“though引导的状语从句＋主句”，其中，让步状语从句又用了倒装形式，正常语序应该是though it sounds odd，主句是由and 连接的两个并列分句。
[句子翻译]
宇宙膨胀说虽然听似奇特，但它是基本粒子物理学中一些公认的理论在科学上看来可信的推论。许多天体物理学家七八年来一直认为这一论说是正确的。
[翻译技巧]
从句中的it指代的是主句的主语cosmic inflation，按照汉语习惯，应在从句中先译出来。而且汉语中尽量避免像英语中那么频繁地使用人称代词。一般说来，将它所替代的实际内容翻译出来为好。本句中的两个it均指宇宙膨胀理论。scientifically plausible consequence应该译为“在科学上令人信服的推论”，避免如下错误译法“自豪的结果，相应的部分，称道的结果”。for the better part of a decade= for more than half of a decade，实为“十年中的一大半”，故可译为“七八年”。
34. 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.
[句子主干]
While warnings are often appropriate and necessary…and many are required by…, it isn’t clear that they actually protect the manufacturers and sellers from…