效率降低的英文：
loss of efficiency

loss是什么意思：
n. 损耗，亏损；丢失；去世；失败；浪费；降低；减少

Depreciation, loss of market, loss of use and other consequential losses of any description.
贬值、丧失市场或使用价值等其他后果损失。

The school was lamed by losses of staff.
学校因教职人员流失而开不了课。

loss and damage or delay of goods.
贷物的损失、损坏或交付延误。

He is a loss adjuster.
他是险损估价人 。

profits and losses on disposal of investments
转让投资的损益

efficiency是什么意思：
n. 效率，功效；提高功效的方法

The service productivity is the function, including external efficiency, intestine efficiency and capacity efficiency.
服务业的生产率是一个包含有外部效率、内部效率和能力效率的函数。

The efficiency of the tandem system is perfect.
这个串联系统的工作效率无可挑剔。

To destroy or hinder the efficiency of; frustrate.
使不起作用使无效或限制其效力的发挥；阻挠、挫败

He is an efficient manager.
他是一位办事效率高的经理。

Their labor efficiency is very high.
他们的工作效率很高。