With chemical testing, knowing which genes to modify is hard.
用药物进行实验，要知道那种基因需要改良比较困难。
To comply with the us Toxic Substances Control act, manufacturers turn to testing LABS, which expose animals-usually rodents-to high levels of the chemical in question.
为了符合美国有毒物质控制法，制造商们转而进入实验室，选择动物作为试验对象，通常他们会选择啮齿动物。
The testing results were compared with the that of chemical coupling treated method and that of oxygen plasma treated method.
将试验结果与化学交联和等离子氧处理的结果进行了比较。
It gains satisfactory result to testing performances of the system with standard chemical samples.
用标准化学样品对本系统进行了测试，获得了满意的结果。
Agricultural Chemical Residue Lab is equipped with advanced testing equipments including gas chromatograph and liquid chromatograph and can test about 10 samples per day.
农残检测室有气相色谱仪、液相色谱仪等先进的检测设备，每天可检测样品10个左右。
So it is significant to develop testing methods with high sensitivity. Chemical derivatizations is one of the most effective procedures to change the properties of corresponding compounds.
为此利用化学衍生反应改变被测化合物性质使之能够被灵敏、快速和自动化测定具有重要意义。
Factory production of building templates with acid, alkali, heat, water and other functions, the physical and chemical testing by the relevant index reaches domestic advanced level.
本厂生产的建筑模板具有耐酸、耐碱、耐热、防水等功能，经有关部门检验各项理化指标均达到国内的先进水平。
Finally, comprehensive analysis the failure reason of valve body combined with the rest of physical testing and chemical analysis and FEM analysis.
最后，结合理化检验结果及有限元分析结果，综合分析了阀体失效的原因。
Thispaper also gives the details about the upper leather technology of dog skin with poor hair, the chemical and physical testing standard and outline property.
文章以狗板皮正鞋面革为例，对狗板皮制革工艺。成革理化指标及革的外观性能作了较为详细的介绍。
Thispaper also gives the details about the upper leather technology of dog skin with poor hair, the chemical and physical testing standard and outline property.
文章以狗板皮正鞋面革为例，对狗板皮制革工艺。成革理化指标及革的外观性能作了较为详细的介绍。
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