og-129,NN讲讲C,E是如何削弱的，谢谢

129. The pharmaceutical industry argues that because new drugs will not be developed unless heavy development costs can be recouped in later sales, the current 20 years of protection provided by patents should be extended in the case of newly developed drugs. However, in other industries new-product development continues despite high development costs, a fact that indicates that the extension is unnecessary.

Which of the following, if true, most strongly supports the pharmaceutical industry's argument against the challenge made above?

(A) No industries other than the pharmaceutical industry have asked for an extension of the 20-year limit on patent protection.

(B) Clinical trials of new drugs, which occur after the patent is granted and before the new drug can be marketed, often now take as long as 10 years to complete.

(C) There are several industries in which the ratio of research and development costs to revenues is higher than it is in the pharmaceutical industry.

(D) An existing patent for a drug does not legally prevent pharmaceutical companies from bringing to market alternative drugs, provided they are sufficiently dissimilar to the patented drug. B

(E) Much recent industrial innovation has occurred in products---for example, in the computer and electronics industries---for which patent protection is often very ineffective.

og-129,NN讲讲C,E是如何削弱的，谢谢

斑竹能否接活一下:

e似是无关？选项说INEFFECTIVE PATENT PROTECT可导致INNOVATION 效果。原文说PATENT时间要不要延长。为甚OG说消弱？

d。消弱或无关？。PATENT对PATENTED DRUG 根本起不到保护，还用谈时间要不要延长？

看一下推理：

成本抵偿后才有有新的产品的研发，有必要延迟专利

但其他产业也有成本很高收入较低的，所以没有必要

我们找一个能反对推理的选项：即有必要专利延期

C 在重复原文，那么药厂坚持的专利延期会被削弱

D 专利能生产什么药，非法的还是合法的不是文章讨论的内容

E 按E说的，专利无效就有innovation，那么似乎是支持了原文，专利时期不用延长。

明白一些:

E中INNOVATION与原文NEW DRUGS在讲同一个事情:NEW PRODUCT DEVELOPMENT.所以有关了,即削弱.

只是D 仍不能参悟.

E 是无关，讲的是其他行业的情况，隔行如隔山，并不能够解释 Why pharmaceutical industry need longer patent protection!

D 也是无关，没有涉及到 Why pharmaceutical industry need longer patent protection!

  能不能解释下（D）是什么意思啊？？

(D) An existing patent for a drug does not legally prevent pharmaceutical companies from bringing to market alternative drugs, provided they are sufficiently dissimilar to the patented drug.

  尤其是最后的那个“provided they are sufficiently dissimilar to the patented drug. ”  实在是搞不懂它和前面的怎么联系的。。。

谢谢！