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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Creep damage was marked in some bend which local stress is higher.

有的弯管由于局部应力较高，蠕变损伤明显。

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The experimental results have shown that through a comparison of cavity diameters and the number of cavities, the former has shown a marked influence on the stress values of 50% explosion probability.

试验表明，当比较疵孔直径和疵孔数的作用时，孔径大小对50%爆炸概率的应力值影响极大。

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Another van der Sloot attorney, Jose Luis Jimenez, said his client was under special stress the day of the 2010 murder, which marked five years after Holloway, an 18-year-old from Alabama, disappeared while vacationing on Aruba.

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