Halving the Polygonal Areas with Rulers and Compass

标尺作图二等分多边形面积

With the slow pace of progress achieved since 1990-1992, prospects for reaching the WFS goal of halving the number of hungry people by 2015 appears increasingly remote. Closer analysis reveals that these numbers mask an even more alarming trend.

从1990-92年至今,我们仅仅取得了缓慢的进展,世界粮食首脑会议的目标,即到2015年将饥饿人口的数字减少一半,离我们似乎越来越遥远。近期的分析显示,这些数字隐藏着一个更加令人担忧的趋势。

Current Situation: Comparing of these two figures reveals a decrease of barely 2.1 million per annum over the 9 years, far below the diminution of 22 million a year required to achieve the WFS goal of halving the number of hungry people by 2015.

当前局势:比较这两个数字我们会发现,9年中每年下降人数仅仅为二百一十万,这远远低于达到世界粮食首脑会议的目标(即到2015年将饥饿人口的数字减少一半)所要求的每年减少两千两百万的标准。

Halving the repeater spacing made it possible to quadruple the bandwidth.

将增音机间距减少一半,能使宽带增加3倍。

A one-foot rod can be halved everyday for ten thousand generations. /cut away half of a rod and keep on halving what is left, and there will be no end to that process.

一尺之棰,日取其半,万世不竭

An increase/decrease of 3 DIN units indicates a doubling /halving of film speed ,that is a film of 21 DIN(100ASA)is half the speed of24DIN(200ASA)film ,and double the speed of an 18DIN(50ASA)film.

增加或减少感光3DIN,则相应增加或减少感光速度一倍。例如,21DIN(100ASA)的感光速度比例24DIN(200ASA)慢一倍,但比18DIN(50ASA)的菲林快一倍。

||1:While many Asian nations continued to purchase oil from Iran during sanctions, Western nations halted imports, halving Iran's overall exports to as little as one million barrels per day, or bpd.||2:Last month, Iran exported about 1.1 million bpd to Europe including Turkey, almost reaching pre-sanction levels and only slightly below the 1.2 million bpd supplied to Asia.||3:Iran's overall May oil production totaled 3.9 million bpd.

||1:虽然在制裁期间，很多亚洲国家依然从伊朗购买石油，但是西方国家停止了进口，将伊朗的总出口量缩减了一半，平均每天只有100万桶。||2:上个月，伊朗每天大约向土耳其等欧洲国家出口110万桶石油，几乎赶上了制裁前的出口量，而且仅仅稍低于亚洲120万桶/日的出口量。||3:伊朗5月份的石油产量达到了390万桶/日。

"We're very close to achieving the Millennium Development Goal of halving hunger by 2015. We won't make that target because it's next year and because of the food price crisis, but the effort that's been put in over the last few years really puts us on track," Lateef said.

拉蒂夫说：“我们非常接近于实现2015年饥饿人口减半的千年发展目标。我们无法达到该目标，是因为2015年就在明年，还因为发生了粮食价格危机。但过去几年落实的措施使得我们步入了正轨。”

JOY LAWN: "Not delivering the baby onto a dirty surface, drying the baby, keeping the baby warm and feeding the baby straight away resulted in almost a halving of newborn deaths in very rural areas in India."

罗恩：“不要把婴儿分娩到脏污场所，擦干婴儿，保持婴儿身体暖和，立即喂养婴儿使印度非常偏远地区新生儿死亡人数减少了近一半。”

Despite a widely panned redesign of its app, Snap, the parent company of Snapchat, increased revenues by 36% in the last three months of 2018 compared with the same quarter a year earlier. Having never reported a profit since going public in 2017, investors took comfort in the halving of its loss for the quarter, to $192m.

虽然Snapchat对应用重新进行了大改版，但其母公司Snap在2018年第四季度的营收同比增长了36%。自2017年上市以来，该公司从未公布过盈利的财报，投资者对该季度亏损减半至1.92亿美元甚感欣慰。

When the market for big jets collapsed after the terrorist attacks of September 2001, Boeing drew in its horns, halving production.

2001年9月恐怖袭击使大型喷气式飞机的市场瞬间崩塌，波音紧缩开支、产量减半。

Supporting Merkel's approach, the G-20 endorsed a halving of budget deficits by 2013 as the target.

20国集团支持默克尔的方针政策，同意截至2013年财政赤字减半。

By halving prices and lifting limits on the length of calls, Mr Niel hopes to take a big slice of the market.

Niel先生希望通过价格折半和提高通话时间限制，抢占大部分市场。

Carmakers, for instance, are roughly halving production, with consequences for makers of steel, chips and chemicals.

比如，汽车制造业大约减产一半，会对钢铁、芯片、化工制造业产生连锁反应。

And the disparities are growing. India seems certain to miss one of its key Millennium Development Goals: halving malnutrition by 2015.

并且这种差距在逐年加剧，因此，印度肯定不能完成他的第一个千年发展计划——在2015年前，将营养不良人数减半。

But the word is that next month the European Commission will propose halving this number.

但是，有消息称在下个月欧盟将会提议减半这个数字。

Automatic collimation of norm pole was realized by precisely halving norm pole on the method of subpixel on former gray image.

对原图像灰度化，在标杆区域内利用像素细分法最终精确平分标杆，实现标杆的自动精确瞄准。

Take the goal of halving the poverty rate from its 1990 level by 2015.

对照该目标，其中有一项是：到2015年，将贫困人口比率从1990年的水平减半。

The male, XY stem cells underwent the crucial process of "meiosis" - halving the number of chromosomes.

而男性的XY干细胞还需要通过重要的“减数分裂”过程，也就是说，染色体细胞减少了。

Airlines recently announced a target of halving emissions by 2050, and shipping companies are considering a similar deal.

航空业最近宣布了到2050年排放量减半的目标，船运公司也在考虑类似的方案。

Even halving its external surplus would add only 0. 4 per cent to aggregate demand in the rest of the world.

即便中国的对外盈余减少一半，也只能令世界其它地区的总需求增加0.

halving the auto purchase tax for cars with engine sizes below 1. 60 litres

减半汽车排量在1.6升以下的消费税

You found that halving your salary cut your enthusiasm.

你发现，薪水减半降低了你的工作热情。

Europe wants the G8 to commit to a goal of halving by mid-century the emissions that cause global warming, compared with 1990 levels.

欧洲希望G8承诺，致力在2050年前达到温室气体排放量较1990年水准减量一半的目标。

A halving of the planting area last year, and belief in the bulb's powers to ward off swine flu, provide some justification for the surge.

去年种植面积减半，加之目前人们相信大蒜有助于抵御猪流感，为这种飙升提供了一些合理解释。

A global halving by 2015 seems well within reach.

全球发展目标中的贫困人口减半目标在2015年似乎完全能够实现。

But in the last survey, released in March, London's point total had slipped, halving its lead over New York.

然而，在3月份发布的上次调查中，伦敦总得分下降，与纽约的差距缩小了一半。

Sweden made halving unemployment its priority during its 1990s fiscal consolidation.

瑞典在上世纪90年代财政整固期间，曾将失业率减半列为优先事项。

Until the global financial crisis hit, Bangladesh was on track to meet the Millennium Development Goal of halving poverty by 2015.

若非金融风暴来袭，孟国完成千年发展目标（到2015年消除一半贫困人口）指日可待。

Millions will be lifted out of poverty, halving the number of people below the $1-a-day poverty line.

数以百万计的人将摆脱贫困，使生活在每日1美元贫困线下的人数减半。

halving belt

交带

halving line

二等分线

halving line

半像线

halving line

平分丝

halving joint

半嵌接

Halving joint

半接榫

halving joint

对嵌接头

halving method

二等分法

halving method

等分法

halving method

减半法

corner halving

角嵌接

halving becket

掐包束纲

halving circuit

平分电路

dovetail halving

鸠尾榫制作

halving register

平分寄存器

interval halving

区间半分法

interval halving

区间对分法

interval halving

区间分半法

frequency halving

频率减半

frequency halving

频率二等分