The research also shows how effective "target hardening" (ie, self-protection against crime) can be.

研究也向我们展示“目标硬化”(即防范犯罪的自我保护)的高效性。

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During the tobacco hardening period bed of tobacco seedling was the falling target of alate aphids and was the main resource of tobacco virus spread by aphids.

炼苗期烟草苗床是传毒介体有翅蚜着落的靶子中心，是烟田蚜传病毒病的主要初侵染源，为防治烟草蚜传病毒病的关键时期。

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Hardening depth related to the technical parameters and the quenching temperature field is an important target by plasma surface quenching.

硬化层深度是等离子弧表面淬火效果的重要指标之一，而硬化层深度与工艺参数、淬火过程中温度场的变化密切相关。

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Wireless service providers have spent years hardening their defenses against the onslaught, while those spammers who might seek to target cell phones are digging in.

FORBES: Magazine Article