他还担心越来越都市化的社会以及长时间工作的夫妻双方的压力会加重狗儿的负担。

He also worries that the increasing urbanisation of society and the pressures on couples to work long hours are putting dogs under huge strain.

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1950年，苏联人造卫星升空震惊了美国社会，而后为了追赶苏联的脚步，学生的作业负担也加重了。

In the 1950s, the Sputnik launching ushered in heavier workloads for American students in the race to keep up with the Soviet Union.

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最近收入税的降低和社会福利捐资虽已使危机有所缓和，但是却大大加重了国家的长期债务负担。

Recent cuts in income tax and social-security contributions softened the crisis but greatly increased the long-term burden.

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