"When you start moving towards an industrial revolution, it is economically efficient to have people living close together," says Macfarlane.
麦克法兰说：“当你开始迈向工业革命的时候，从经济学角度来说让人们住得很近是富有效率的。”
Tolling is economically efficient: it prices an overused resource (crowded roads).
征收通行费在经济上是有效的，它针对过度使用的资源（拥堵的道路）引入了价格杠杆。
But the transition to low carbon must be managed carefully if it is to be done in an economically efficient manner.
但如果要以一种有效的经济方式向低碳过渡，慎重的管理必不可少。
Installing air surge tank in pressure water system is a new and economically efficient measure to prevent water hammer accident.
压力水系统中设置气压式调压室是防护水锤事故的、新的、经济有效的措施。
My mission is to continually enhance and improve software technology, and people more easily and more economically efficient and more fun to use the computer.
我的使命是不断地提高和改进软件技术，并使人们更加轻松、更经济有效而且更有趣味地使用计算机。
It argues that charging policy, based on marginal cost pricing, is economically efficient, and facts show that relevant principles are more widely accepted by airport operators.
利用边际成本定价模式确定飞机所需交纳的起降费从经济学角度来说是富于效率的，并且相关的原则也为越来越多的机场所采纳。
Thyristor control phase shifter (TCPS) is one of the new facilities implemented in power network, leading to the development of economically efficient and technically reliable system.
晶闸管控制移相器(TCPS)是电力网络中的新设备之一，借以改善电力系统运行的经济性和可靠性。
In line with the features of accumulative bauxite ore, it is put forward and proved that it is an economically efficient way to solve the utilization of low grade accumulative bauxite by ore blending.
结合堆积型铝土矿的特点，提出并论证了通过配矿方式解决低品位堆积型铝土矿的利用问题是经济合理的办法。
In line with the features of accumulative bauxite ore, it is put forward and proved that it is an economically efficient way to solve the utilization of low grade accumulative bauxite by ore blending.
结合堆积型铝土矿的特点，提出并论证了通过配矿方式解决低品位堆积型铝土矿的利用问题是经济合理的办法。
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