Stress levels increased 18% for women and 24% for men from 1983 to 2009.
从1983年到2009年,女性和男性的压力水平分别上升了18%和24%。
It is now believed that increased levels of stress, climate change and even artificial light at night may contribute to expanding waistlines.
人们现在认为,压力水平上升、气候变化、甚至连夜晚的人工照明都有助于扩大腰围。
The levels of stress and testing duration increased during the subsequent iterations.
在后继的迭代中,压力的等级和测试持续时间增加了。
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