高增益和较大的前后比使UHF信号被极好地接收。
High gain and excellent front-o-back ratio so that UHF can be received consistently.
结果：两组患者FEV1、FEV1百分比均较治疗前改善，治疗前后比较差异具有统计学意义（P〈0.05）；
Result:The FEV1 and the percentage of FEV1 in two groups after treatment was superior to that before treatment, and there was significant difference in them respectively(P<0.05).
基于端射阵理论，优化设计了一副小型宽带、具有大前后比的双鞭天线，并以此作为阵列天线的基本单元组成六元均匀线阵。
Then, based on the end-fire array theory, a small broadband twin-whip antenna with big forward to backward ratio is designed.
美索不达米亚的汉谟拉比王早在4000年前就开始对衍生工具的使用进行了管理，日本人1650年前后就从事大米的期货交易。
KING HAMMURABI of Mesopotamia regulated the use of derivatives almost 4,000 years ago. The Japanese have been trading rice futures since around 1650.
美索不达米亚的汉谟拉比王早在4000年前就开始对衍生工具的使用进行了管理，日本人1650年前后就从事大米的期货交易。
KING HAMMURABI of Mesopotamia regulated the use of derivatives almost 4, 000 years ago. The Japanese have been trading rice futures since around 1650.
根据人口统计局的人口计量仪测算，在10月17日或此日前后，美国的人口数将突破3亿，与1967年时的2亿相比，更上一层。
On or around October 17th, according to the Census Bureau's population clock, the number of people in the country will hit 300m, up from 200m in 1967.
SOM简单精致的解决方案对由密西西比河流过中心，Ponchartrain河与墨西哥湾前后夹击的新奥尔良来说却难有用武之地。
The simple elegance of SOM’s solution would have little application in New Orleans with the Mississippi River running through its heart, Lake Ponchartrain at its back, and the Gulf at its flank.
锻炼前后中老年人总体感觉很好的占78%，食欲提高的占81%，睡眠比过去好的占74%，体力精神比以前好的占90%和78%。
During the exercise, 78% people felt well, 81% had a better diet, 74% had a better sleep, 90% and 78% felt better in spirit and physical strength than before.
前后历时38年，比埃及胡夫金字塔修建的时间还要长八年呢。
It lasted 38 years, eight years more than it took to build Khufu's Pyramid of Egypt.
这些基本参数包括整车质量、质心位置、前后轮侧偏刚度、后轴侧倾转向系数以及转向系刚度和传动比等。
There are the entire vehicle mass, the position of mass center, cornering stiffness coefficients, steering - system stiffness and steering ratio.
采用气相色谱法测定环丁砜对甲苯的抽提能力，通过改变温度、甲苯与正己烷的质量比等实验条件，研究了添加剂对环丁砜劣化前后甲苯抽提能力的影响。
Effects of temperature, mass ratio of toluene ton-hexane especially additive on extractive capability of sulfolane before and after partial degradation were investigated.
目的：用计算机数字化表达利声显增强前后正常肝和肝硬化平均灰度值和彩点百分比。
Objective: Computer digitally expresses the average grey scale values and color point percentages in normal and cirrhotic livers before and after Levovist enhancement.
他们认为会议的前前后后比会议本身还重要，而决策总是秘而不宣。
What happens before and after is more important than the meeting itself; decision making is always secretive.
两组治疗前后空腹及餐后两小时血糖无明显差异（P＞0.05），但治疗组糖化血红蛋白治疗后明显降低（P＜0.05）。 两组治疗后症状改善，但糖络通组比肌醇组有一定优势。
There was no significant dissimilarity between pre and post treatment on FPG and PPG in the two groups (P>0.05), but HbAIC became lower after treatment in the A group (P<0.05).
目的：了解磁性附着体基牙龈下微生物组成与正常龈下微生物组成比的差异及卫生指导前后基牙龈下微生物数量及组成的改变。
Objective: to study the changes of microflora in subgingival groove of abutment in patients with magnetic attachments after oral hygienic instruction and with normal persons.
线片：所有病例的患髋均应摄前后位和侧位X线片，判定松动征兆，评估一系列的X线片比单一图片信息量大。
Plain radiography: All patients should have an AP and a lateral X Ray of the affected hip. Evaluation of serial x-rays is more informative than a single image in assessing signs of loosening.
指出了影响综放工作面前后部刮板输送机能力匹配的主要因素是采放高度比；
The results indicate that the main factor influencing the capacity matching of the conveyors in front and behind is the ratio of mining height to caving height.
结果实施意外防范监控前后，意外发生率经字2检验，P<0.05，有显著性差异，实施防范监控后意外发生率比实施前降低。
Results After implementation of preventing and monitoring accidents, accidental rate dropped significantly than before. Tested by X2, significant difference existed (P<0.05).
7月7日前后一周你将听到关于一笔钱进账的消息，你也许会花一点，但是很显然你得到的比花掉的要多。
News of a commission, bonus, advance, or other chunk of cash may come your way July 7, plus or minus one week. You may have to write a check too, but it appears more money will flow in than goes out.
通过对浮环减薄前后实验结果的对比分析，研究了浮环厚度变化对浮环轴承涡动及稳定性的影响，并给出了三维谱图、涡动比与转速图、典型分岔图。
Based on two experiments on floating ring bearing before and after floating ring thickness reduction, the effect of thickness variation of floating ring on whirl and stability was studied.
如果你出生于11月13前后五日，满月会触摸到你最多，也给你比最多还多的保护。
If you were born on November 13 or within five days of this date, this full moon will touch you more than most, and protect you more than most, too.
前后没有超过两小时，但似乎比几个星期还长。
It could not have lasted more than two hours: many a week has seemed shorter.
二个飞行员座位在座舱内前后串列，后座比前座略高提供更多的视野。
Two pilot seats are located in tandem in the cockpit, with the rear seat higher than the front seat to give better view.
两组研究前后的组间及组内比较AP和VP百分比亦无明显差异。
There was no significant differences in the percentage of AP and VP before and after treatment between the two groups.
美国现在是头号石油和天然气生产国，美国的驾驶人们比去年圣诞节前后每加仑可以节省大约70美分的油钱。
America is now the number one producer of oil and gas, saving drivers about 70 cents a gallon at the pump over last Christmas.
但是，前后5年对比，模型构建和案例分析方法明显增长，阐述法却呈下降趋势；定量分析方法也大幅度的增加。
However, from the comparison of 5 years, more literatures adopted modeling and case study method as well as quantitative analysis method, while less research used the method of elaboration.
并对影响酸碱污染土压缩性的各种因素进行分析研究，包括土污染前后的粒度分析、塑性指数、含水率分析以及孔隙比。
All kinds of factors influencing the compressibility of polluted soil were analyzed, including grain-size distribution, plasticity index, moisture content and void ratio.
方法建立实验性血管性眩晕气虚血瘀证家兔模型，以西比灵胶囊为阳性对照药进行比较，观察眩晕定方干预前后血液流变学和脑血流图等改变情况。
Methods The vascular vertiginous model rabbits with QDBS were prepared, and compared with medicine sibelium, the effects of XYD on REG and blood rheology in these models were evaluated.
方法建立实验性血管性眩晕气虚血瘀证家兔模型，以西比灵胶囊为阳性对照药进行比较，观察眩晕定方干预前后血液流变学和脑血流图等改变情况。
Methods The vascular vertiginous model rabbits with QDBS were prepared, and compared with medicine sibelium, the effects of XYD on REG and blood rheology in these models were evaluated.
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