四分之一

The production of value-added products based on butene oligomerization is one of the effective ways to improve the comprehensive utilization of four carbon fraction.

以丁烯齐聚为基础生产高附加值产品是提高碳四馏分化工综合利用率，为企业挖潜增效的有效途径之一。

Using finite difference time domain method, the electromagnetic field distribution of THz wave is simulated in a THz 2D PC splitter and by plane wave expansion method the dispersion relation and defect modes are achieved in a THz rotated PC waveguide.5. A woodpile three-dimensional (3D) PC with face-centered-tetragonal symmetry is one of the most popular 3D PCs because of its favorable band gap characteristics. Based on the woodpile fct lattice structure, we propose a novel woodpile THz lattice structure with comparatively decreased symmetry, better band gap properties and easy fabrication by varying some structure parameters.

计算结果为利用非线性光学差频方法产生THz辐射源的实验研究提供了深入和全面的理论基础；四、利用平面波展开法，通过改变二维THz光子晶体的结构参数，对二维THz光子晶体完全带隙进行了优化，分析出两种适合工作在THz波段的二维光子晶体结构；采用时域有限差分法和平面波展开法，计算出THz波在二维光子晶体"T"型分束波导，45度旋转波导中传输的电磁场分布以及缺陷模；五、Woodpile面心立方四角结构是三维光子晶体中被研究最广泛的结构之一。

The prime purpose of television was to manufacture fame-an invisible, short—lives,head—turning commodity that creates instant recognition that can be used lucratively.

&电视的主要作用之一是造&名&——这东西是无形的，短命的，使人头脑发昏，但是容易认知，所以可以拿来赚钱&。考生可以把四个选项都放到原文里推敲，不难看出答案A&头脑发昏的&是正确的。其它选项分别是&引人注目的&即时认知的和令人头痛的。

There is four two-color automated printing machines, three slotting cutting paper machines, five disparting paper machines with thin slice, ten punchers in the cardboard department. It is one of the best scale cardboards and cartons producing factories in Jiangmen city.

纸箱车间现拥有全自动三色印刷机一台、双色印刷机四台，开槽切纸机三台，分纸机带薄刀片五台，打钉机十台；是目前江门地区最具规模的纸板、纸箱生产厂家之一。

The countryaccounts for about a fifth of the world's population, yet it gobbles upmore than half of the world's pork, half of its cement, a third of itssteel and over a quarter of its aluminium.

这个国家有世界人口的五分之一，但它消耗了全世界半数以上的猪肉，半数的水泥，三分之一的钢材和四分之一的铝材。

He was talking about how this solidifies his performance as one of the great quarterbacks of the game, and I think he's right.

他说这如何强化了他作为比赛中优秀四分卫之一的表现，而我认为他是对的。

The moon is one forty-ninth the size of Earth.

月球的体积是地球的四十九分之一。

It was published as the famous city of Chinese history culture in 1986, the excellent tourism city in 2004, the fourth city of a large population of 10.77 million which is about one sixths of the population of Hebei province.

保定市是河北省的政治、军事、文化中心。1986年被国务院公布为中国历史文化名城，2004年被公布为中国优秀旅游城市，总人口1077万人，约占河北省人口的六分之一，为全国第四人口大市。

After that, pour out the herbal juice to get a small half of bowl (approximately 100 ml), then add water to the pot and boil it with the above method, boil the herbs like this totally for five times, finally put the herbal juices together, and take it warm every two hours, one fifth of it at a time and one packet every day.

上药共入锅中，加水约两大碗，大火煮沸后，改为小火煮三十至四十分钟，取药汁约小半碗倒出，再加水依上法煮之，连煮五次，将药汁合为一处，二小时温服一次，每次服五分之一，日一帖。

An impoverished region with an annual income a mere fifth of the national average, many residents here cannot afford a prosthesis; at an average cost of 423 USD, it is more than four times their monthly income. Tzu Chi volunteers in Zamboanga felt deeply for their fellow residents, and they started an outreach program in March 2003, offering free prostheses to the poor.

这些地区居民相当穷困，收入只有一般国民所得的五分之一，购买义肢约需423美元，超过他们四个月的薪资，这种情况让三宝颜慈济人看了於心不忍，因此从2003年3月开始，三宝颜慈济人开始为贫民免费装义肢。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。