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The activities of carboxylesterase、glutathion-S-transferase and acetylcholinesterase per insect increase greatly and the properities of esterase and acetylcholinesterase change also throughout larval development from 1-day-old to 4th instar. The affinity for Asch and the sensitivity to insecticide of acetylcholinesterase in 3rd instar larvae are significantly lower than that in 4-day-old larvae.

幼虫从1日龄生长到4龄时,单头幼虫的羧酸酯酶、谷胱甘肽转移酶、乙酰胆碱酯酶活力急剧增长,4龄幼虫相对于1日龄幼虫,HJ-R、HD-S上述3种酶系的活力分别增长了148、172.6、65.6倍和203、60.9、77.4倍;生长过程中,全酯酶、乙酰胆碱酯酶的性质也发生变异,特别是从4日龄生长到3龄时,乙酰胆碱酯酶的米氏常数、双分子速率常数均发生明显的改变,3龄幼虫乙酰胆碱酯酶对底物的亲和力以及对杀虫剂的敏感性显著低于4日龄幼虫。

Actually, the development of genetically-modified products is a double-edged sword: On the one hand, it contributes to the enhancement of the world crop yield, as well as the quality, and reduction of chemical fertilizer and the pesticide use, helps solution of the famine and undernourishment in developing countries. Besides, it also promotes the development of certain related industries like pharmaceutical and chemical industries; On the other hand, it also brings the unprecedented threat for human beings. We are unaware of the potential effects in human bodies, or any unknown injury to the next generation, caused by genetic modification. Nor can we forecast what kind of influence to the extant gene will emerge.

而事实上,转基因生物技术的确是一把双刃剑:一方面,转基因技术可以提高世界农作物产量、提高质量、减少化学肥料和杀虫剂的使用、解决发展中国家的粮食缺乏、饥饿和营养不良的问题,另外,基因技术的飞速发展在很大程度上也促进了医药、化工等相关行业的发展;另一方面,它也为整个人类带来了前所未有的威胁,人们无法得知基因序列的改变会在体内引起何种潜在的变化,无法确定转基因产品是否会对下一代产生任何未知的伤害,无法预测转基因产品对现存基因会产生何种影响。

Actually, the development of genetically-modified products is adouble-edged sword: On the one hand, it contributes to theenhancement of the world crop yield, as well as the quality, andreduction of chemical fertilizer and the pesticide use, helpssolution of the famine and undernourishment in developingcountries. Besides, it also promotes the development of certainrelated industries like pharmaceutical and chemical industries; Onthe other hand, it also brings the unprecedented threat for humanbeings. We are unaware of the potential effects in human bodies, orany unknown injury to the next generation, caused by geneticmodification. Nor can we forecast what kind of influence to theextant gene will emerge.

而事实上,转基因生物技术的确是一把双刃剑:一方面,转基因技术可以提高世界农作物产量、提高质量、减少化学肥料和杀虫剂的使用、解决发展中国家的粮食缺乏、饥饿和营养不良的问题,另外,基因技术的飞速发展在很大程度上也促进了医药、化工等相关行业的发展;另一方面,它也为整个人类带来了前所未有的威胁,人们无法得知基因序列的改变会在体内引起何种潜在的变化,无法确定转基因产品是否会对下一代产生任何未知的伤害,无法预测转基因产品对现存基因会产生何种影响。

Imino-1, 3-thiazetidines is the basic structure of a kind ofbioactive herbicide and insecticide. Our method has advantage in synthesis highly substituted2-imino-1, 3-thiazetidines, therefore it has practical value to some extent. We also researched the reactions catalyze by active zinc dust.

提供了成四员噻吖丁啶杂环衍生物的方法。2-亚胺基-1,3-噻吖丁啶是一类具有生物活性的除草剂及杀虫剂的核心结构,我们的方法在合成多取代的2-亚胺基-1,3-噻吖丁啶方面有一定的优越性,从而具有一定的实用价值本文另一部分的工作是探讨锌粉催化的反应。

Most important, proven weapons— principally, insecticide-treated bed nets, other antimosquito strategies, and new combination drugs featuring an ancient Chinese herb— are moving to the front lines.

最重要的是,已经证实有效的武器,正朝对抗疟疾的前线移动,这些武器主要是含有杀虫剂的蚊帐、他的抗蚊策略,以及根据古老中国药草而来的新组合药物。

C.fatigans to Deltamethrin had a high resistance level in different regions of Jiangxi Province;The resistance to DDVP and Acetophenate showed apparent; The resistance to Bassa were not obvious.

摘 要 目的:探讨我省不同地区致乏库蚊对化学杀虫剂的抗药性现状。方法:采用浸渍法测定致乏库蚊幼虫的LC50。结果:不同地区致乏库蚊对溴氰菊酯均达到相当高的抗性水平;对敌敌畏和三氯杀虫酯的抗药性明显;对仲丁威的抗药性尚不明显。

Under the support of the National, Guangdong and Guangzhou industrial incubation project, we have set up the biggest manufacture system and technology in China, which are even seldom seen in the world. We own: 2000L liquid fermentation industry system; 3 national invention patents including its manucfature and transport tenology Two types of entomathogenic nematode have got the import permission from the Agriculture Department of United States. Advanced methods of culture media and liquid cultivation conduce to the three times of production compared with other nematode commercial companies in the oversea, as well as the high quality control and transport technology are contributed to the firm fundamention of commercialization.

在国家,广东省与广州市等一系列产业化孵化项目的资助下,我们现已建立了年产50万亿线虫(可用于100万亩苹果小食心虫的防治),目前国内规模最大,国际上为数不多的生产系统和生产技术;拥有: 2000L 液体发酵生产系统;昆虫病原线虫产业化生产和储运技术等自主知识产权(3项国家发明专利);两个线虫产品已获美国农业部核准的&准入&许可优化的培养基配方和液体培养方案,可获得比国外线虫商业公司专利培养基高出三倍的线虫产量,以及完善的产业化质量控制技术和贮运技术,这些均为这类生物杀虫剂的产业化奠定了坚实基础。

The product safe quality problem According to 《federal food, drugs and cosmetics method 》provision, imply poison quality, dirty, use insecure food additive or dye, the production processes or packs under the dirty condition and sand door surname germ or the food of insecticide, drive all is is the adulterates false food In the quilt the doubt 569 batches of foods that may imply to the harmful material of the human body health but is detained, mushroom 546 criticize, stand 95.96% BE thought the dirty reason mainly is because of having hair, fly, insect in these foods, rat hair, feather etc..

请英语高手帮我翻译一下,地道的英语,谢谢?产品安全质量问题根据《联邦食品,药品和化妆品法》规定,含有毒物质,污秽,使用不安全的食品添加剂或色素,在不卫生条件下生产加工或包装以及沙门氏菌或杀虫剂的食品,均被是为搀假食品在被怀疑可能含有对人体健康有害的物质而被扣留的569批食品中,蘑菇546批,站95.96%被认为污秽的原因主要是因为这些食品中有头发,苍蝇,昆虫,老鼠毛,羽毛等。

The dangers of pesticides are obvious, and feces can carry any number of parasites which can be transmitted to cavies eating contaminated greens.

杀虫剂的危害是明显的,而粪便可以携带任何数量的寄生虫将其传播到吃被其污染过的绿色蔬菜的猪猪身上。

Biological effects of the biocide zinc pyrithione, used in anti-dandruff shampoos and antifouling paints and the agricultural insecticide imidacloprid on japanese medaka fish were assessed in experimental rice fields.

用在抗头皮屑的洗发水和防污油漆以及专门用于日本青鳉的农业杀虫剂的有效成分锌羟基吡啶硫酮的生态影响在的水稻实验田接受评估。

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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。

I'm running my simile to an extreme.

我比喻得过头了。