Most fingerprints can't be seen to the eye and require a chemical development process in order to make them shown.

大多数指纹是肉眼看不见的，需要经过化学显影过程才能显示出来。

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Some researchers are convinced that ingesting the chemical can interfere with development of the reproductive and nervous systems and possibly promote cancer.

一些研究者认为，摄取这种物质会影响生殖系统和神经系统的发育，并有可能诱发癌症。

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Therapeutic solutions that target the behavioral, chemical, and genetic components of the disease are all in development.

针对这一疾病行为性的，化学物质的和基因因素的治疗方法仍在研究当中。

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In the latest development, U.S.authorities are launching an investigation into the presence of the toxic chemical cadmium in children's jewelry imported from China.

VOA: standard.2010.01.11

The Iranian regime is acting to retain and modernize key elements of its offensive chemical weapons research and development capability and dispersed mobilization facilities, and probably has an offensive biological weapons program.

CENTERFORSECURITYPOLICY: Snare and delusion

The cumulative effect of a year-and-a-half of minimizing the need for an effective retaliatory stockpile, agreeing to terminate production of modern, safe chemical munitions and cancelling development programs for binary bombs and rocket warheads have reduced present options considerably.

CENTERFORSECURITYPOLICY: Center for Security Policy | Bush��s Chemical Chickens Come Home To Roost: Iraqi Crisis Shows Folly Of Chemical Arms Policy

China's sales of a key chemical ingredient for nuclear weapons development to North Korea, as recently as December, should be understood within this context.

CENTERFORSECURITYPOLICY: Why China isn't helping disarm North Korea