Chemical testing showed that over the two years before her death, she moved about every two months.

化学测试显示，在她去世前的两年里，她大约每两个月搬家一次。

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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。

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The company has a full range of physical and chemical testing equipment.

公司拥有种类齐全的理化检测设备。

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Prof van der Meer says the bacterial-based kits cope well with multiple samples, require fewer materials than standard chemical testing field kits, and are easy to prepare.

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He has been shy about specifics but shedding underperformers like the electronics testing and chemical analysis businesses would free up management to concentrate on high-growth, high-profit areas like printers, software and its recordable CD-ROM product.

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Synta, on the other hand, uses the same basic approach that drug companies have used for centuries: taking a library of thousands of chemical compounds, and testing those compounds one by one in the lab until something seems to work.

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