Scientists have long sought to crack the genetic code of healthy aging.

科学家们一直在寻求破解健康长寿的基因密码。

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In a circuit, check key check whether the insulation wiring occurs, aging, soften crack damage.

在检查电路时，应重点检查电线的绝缘层是否发生软化、老化、裂损。

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At present, some Bridges appear aging, damage and crack for some reasons, such as design, construction, management, natural disasters and so on.

由于设计、施工、管理、环境腐蚀、自然灾害等原因，目前已有不少桥梁发生老化、破损、裂缝等现象。

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Then in 1991 murders gradually declined, a circumstance police attributed to an aging crack population.

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