By contrast, L-methionine increased the level of methylation and thus reduced the expression of the gene in animals with loving mothers, and led to fear, anxiety and a heightened response to stress.

与之相反，L -甲硫氨酸增加了甲基化水平，从而减弱了正常老鼠中糖皮质激素受体基因的表达，导致了恐惧、焦虑和对压力的强烈反应。

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The turbulent global stock markets have caused virtually every American a certain level of stress. Those who also struggle with an addiction to tobacco products are at an increased disadvantage.

总部位于华盛顿的反吸烟组织美国遗产基金会的总裁兼CEO谢丽尔•希尔顿在一份声明中说：“全球股市动荡给每个美国人都造成了一定程度的压力。

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Four in 10 employees say their work stress level has increased in the last six months, according to a CareerBuilder survey from late this summer. Two in 10 feel burned out.

根据今年夏末的一项“职业者”调查报告显示，10个雇员之中就有4个声称他们的工作压力在最近的六个月来一直成直线上升趋势，同样，10个之中就有2个声称自己已经感到精疲力竭了。

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Dr Levine was a member of the team which showed that an increased level of autophagy, brought on by the stress of living in a constant state of near-starvation, was the mechanism responsible for this life extension.

ECONOMIST: Exercise and longevity