From the viewpoint of efficiency, the energy of cardiac murmur corresponds to useless work.

从效率的观点看，返流性心脏杂音对应于无用功。

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Pipeline pumps are increasingly doing useless work with the decrease of annual throughput in Renqiu-Beijing Oil Pipeline.

随着任京线年输量的逐渐下降，管道输油泵所做的无用功越来越多。

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Management of Yidelong : Speaking with numbers , equivocal report , account and study are nonsense and useless work , only action can prove all .

益德隆的管理：用数字说话，模棱两可的汇报、说明和研究都是废话、是无效的工作，行动证明一切。

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While the survey shows more than 90 percent of businesses are using firewalls and anti-virus solutions to protect their networks, that protection is useless once employees use a remote connection to access work-related documents.

FORBES: Securing Corporate Data In An Increasingly Mobile World

One of the most useless pieces of advice out there is to not take work personally.

FORBES: Four Steps to Recover Credibility After You Cry At Work

It dates back to Keynes, one of the few economists whose reputation has been burnished by the crisis. (Another is Hyman Minsky, whose main insight was that stability leads to too much debt, and then to collapse.) Most work in macroeconomics in the past 30 years has been useless at best and harmful at worst, said Mr Krugman.

ECONOMIST: Paul Krugman's London lectures