Competition is hugely destructive for a couple but our daily levels of stress mean that it's not so surprising.

竞争对伴侣关系破坏性极大，而我们日常压力表明并非那么让人吃惊。

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While most parents think of back-to-school as an exciting time marked by new backpacks, school supplies and outfits, it can also mean stress and anxiety for many children.

大多数家长认为开学对学生来说是一个很兴奋的时刻，可以背上新书包，有新的学校用品和成套新装备，但对很多孩子来说，开学也可能意味着压力和焦虑。

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Absence of symptoms does not mean the absence of stress.

没有症状并不意味着没有压力。

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And I must also stress that transition,when it happens, doesn't mean NATO forces leave.

VOA: standard.2009.10.23

The researchers stress that this does not mean that the gas does not enter the atmosphere.

BBC: Methane seeps from Arctic sea-bed