The positive rates in different years were compared by chi square test.
并对每年检查出的阳性例数进行百分数计算并作卡方检验。
Natural survival rate of eggs and the various instar larvae in different years were also investigated.
并观察了不同年份棉铃虫卵和各龄幼虫的自然存活率。
OBJECTIVE To analyze the change of pneumoconiosis death causes in Fujian coal mine in different years.
目的：分析我省煤炭系统不同年代尘肺病人死因的变化规律。
Objective: To analyze the difference of the volatile oil of Xinhui Pericarpium Citri Reticulatae in different years.
目的：探讨不同年份新会陈皮挥发油的成分差异。
There were also significant differences in standing, lying, and grooming behaviors of female Amur tigers in different years.
不同年份雌性成年东北虎的站立、躺 卧、梳理等 产仔行为也具有显著差异。
The difference in the interaction between environment and genotype reflected on the unstability of pollen abortion in different years.
环境与基因型互作的差异性导致了花粉败育的年度不稳定性。
Crop variety regional trials in several years result in unbalanced data in which every variety was tested in different years and sites.
作物品种区域试验多年资料系参试品种在试验年份、地区上重复数不等的非平衡资料。
Objective To investigate the relation between TCM syndromes of upper gastrointestinal hemorrhage and solar terms change in different years.
目的探讨年代节气变化与上消化道出血中医证型的关系。
A control study on hospital infection of patients with mental diseases was carried out in the same psychiatric department in different years.
对不同年度同一病区住院的精神病患者院内感染状况进行了对照观察。
If only evaluation of economic benefit, rape was better than wheat, but the economic benefits of maize and soybean were bigger difference in different years.
仅以经济效益评价，油菜纯收益好于小麦，而大豆与玉米年份间差异较大。
The QTL for seed dormancy on chromosome 7 between the marker R1357 and R1245 was a stable expressional locus associated with seed dormancy in different years.
表明第7染色体上位于标记R1357~R1245之间的种子休眠性QTL位点是一个在年度之间稳定表达的控制种子休眠性的基因位点。
The farmland reclaimed in different years are chosen to measure the physical and chemical properties of soil and to investigate the situation of weeds in farmland.
选择不同开垦年限的农田，测其土壤理化性质，调查农田杂草种类状况。
Methods The pfaffia seedlings were transplanted in fields in different years, and their roots, stems, leaves, flowers and fruits developmental growth process were observed.
方法把珐菲亚幼苗在不同年份移栽实验田，对其根、茎、叶、花、果实的生长发育过程进行观察研究。
He grew a different crop on the same field five years in a row, what researchers call crop rotation.
他连续5年在同一块地上轮流种植不同作物，研究人员称之为轮作。
The dove has been a symbol of peace and innocence for thousands of years in many different cultures.
在许多不同的文化中，鸽子几千年来一直是和平和纯真的象征。
In five different years, villages overwhelmingly reported significant population declines.
在不同的五年里，绝大多数村庄报告了人口的显著下降。
Rather, they found that local areas experienced different patterns of rainfall, wind, and erosion, and that such conditions had prevailed in the Southwest for the last 1,400 years.
相反，他们发现局部地区经历了不同的降雨、风和侵蚀模式，在过去的1400年里，这样的条件在西南部普遍存在。
After two years, Habibi and her colleagues reported seeing structural changes in the brains of the musically trained children, both locally and in the pathways connecting different parts of the brain.
两年后，哈比比及其同事报告称，发现受过音乐训练的儿童，他们的大脑在局部和连接大脑不同部位的通路上都发生了结构变化。
Over the years, the game had been produced using letters in different sizes and game boards in different colours.
多年来，这款游戏一直使用大小不同的字母和颜色不同的游戏板来制作。
The various cunning tricks devised to enable text entry in different languages will be needed for some years yet.
在未来的几年里，我们还将需要各种各样巧妙的技巧来实现不同语言的文本输入。
During the following three years, Zhang Yu made great efforts to study and took an active part in different activities to develop her abilities with the help of Li Qiang.
在接下来的三年里，张宇在李强的帮助下，努力学习，积极参加各种活动，锻炼自己的能力。
Will schools be different in twenty years' time?
20年后学校会有所不同吗？
His plays are performed in a different way from they were hundreds of years ago.
他的戏剧表演方式与数百年前不同。
In 10 years, the top cities on the index may be different, but one thing is certain: tomorrow's global cities will be more powerful than ever.
10年后，排名前几位的城市可能会有所不同，但可以肯定的是，未来的环球城市将比以往任何时候都更强大。
It refers to a number of different types of fighting that have developed more than hundreds of years in China.
它指的是许多不同类型的武术，在中国已有数百年的发展历史。
I had been an educator in three different countries for about ten years.
我已经作为一个教育者在三个不同国家工作了大约十年。
I had been an educator in three different countries for about ten years.
我已经作为一个教育者在三个不同国家工作了大约十年。
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