Since The Economist costs just $6.99 (a little less than two burgers) on the news-stand, the index provides decent value for money for would-be currency speculators, the authors conclude.

鉴于本刊报摊零售价不过6.99美元（还不到两个汉堡的价钱），笔者认为我们的指数对欲从事货币投机者来说绝对物超所值。

youdao

So the authors devised an index of narcissism using six publicly available indicators obtainable without the co-operation of the boss.

因此，作者应用6种无需老板合作、通过公众渠道获取的指征，制定了一个自恋症状目录。

youdao

The next two queries cannot use an index because an element "phone408" needs to be returned for every author, even if it is an empty element for authors outside the 408 area code.

下面两个查询不能使用索引，因为必须为每个author返回元素“phone408”，即使是区号408之外的author的空元素。

youdao

He co-authors their Iraq Index, and I asked him how many American servicewomen in Iraq are actually in harm's way.

NPR: A Look at Servicewomen in Harm's Way in Iraq

The authors compute an index of occupational segregation, which compares the composition of employment in individual places with the national profile.

ECONOMIST: Free exchange

The authors did acknowledge that alternative index products do represent a potentially efficient way for investors to buy the risk factors.

FORBES: No Free Lunch from Alternative Indexes