There are precipitation strengthening effect during nature aging and low-temperature annealing, however, the conductivity remains stable basically.

材料在自然时效与低温退火过程中，有沉淀强化效应产生，但导电率基本保持稳定。

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Pre-aging increases the density and volume of precipitates after artificial aging, which decreases the disadvantage of the nature aging and improves the hardness of auto sheets.

区，使得在随后的时效过程中形成高密度的强化相，减少自然时效的不利影响，提高合金的硬度。

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Researchers at Stanford University just published a study in Nature that may give new hope to those looking to stop the effects of aging on the brain.

斯坦福大学研究人员最近在《自然》杂志上发表的研究报告可能会给那些希望减缓大脑衰退的人带来新希望。

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One of the things not in our control, but in the control of nature, is aging, and eventually death, the final act of our being.

FORBES: An Ancient Rule For Coping With Stress

Why do so many aging creatures all over nature like repetition, like listening, for example, to Bob Marley's Greatest Hits over and over and over.

NPR: Does Age Quash Our Spirit of Adventure?

In fact, as the hearing clearly established, the toxic nature of the agents in these aging munitions still makes them extraordinarily dangerous, and potentially useful to terrorists.

CENTERFORSECURITYPOLICY: Gaffney gives 'just the facts' on Iraqi WMD