The delegates in Rome promised to continue efforts to reduce by half the number of hungry people by 2015.

在罗马与会的代表们承诺将继续努力以2015年为限使饥饿人口减少一半。

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In addition, restrictions were set to limit emissions from polluting industries, and a rota-based system was put in place to reduce by half the amount of cars on the streets of Beijing.

另外，一些约束已经实行来限制来自污染工业的排放，而且一个基于值班的系统被实行来减少北京街道上的一半数量的小车。

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We'll need to reduce the weight by half.

我们得把重量减轻一半。

《牛津词典》

The delegates in Rome promised to continue efforts to reduce by half the number of hungry people by two thousand fifteen.

VOA: special.2009.11.23

One of the Millennium Development Goals is to reduce by half the number of people living in extreme poverty by twenty fifteen.

VOA: special.2010.04.26

The World Health Organization aims to reduce by half the number of people who die from tuberculosis by the year 2015.

VOA: standard.2010.07.12

In the bill, they're going to reduce by half the number of guest workers that would be allowed in the United States from 400, 000 to 200, 000.

NPR: One Employer's View of Guest-Worker Plan

In its United Nations Millennium Declaration, adopted in 2000, the international community made commitments to reduce by half, between 2000 and 2015, the proportion of people without access to safe drinking water and to end the irrational use of water resources.

UNESCO: MEDIA SERVICES

Through its Water for Life Decade (2005-2015), the United Nations is working to meet the Millennium Development Goals to reduce by half the proportion of people without access to safe drinking water by 2015 and to put a stop to the unsustainable exploitation of water resources.

UNESCO: Water Policy and Science