useless work的意思|示意

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。

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。

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。