“useless work”簡單造句，useless work造句子

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

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

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