Why do you think countries and cities compete to host mega events? How have these big events changed the host cities?
那么举办如此大规模的活动能够给这些国家和城市带来了什么样的回报和变化？
By far the majority of studies on the impacts of mega events are related to the economic impacts of mega sporting events.
到目前为止，大多数大型活动影响的研究上都与大型体育赛事的经济影响。
According to them this is especially important in the case of mega events, which due to their scale can have a profound impact on the lives of the resident population.
据他们说，这是特别重要的事件的案件，由于大型的规模能有一个常住人口深远影响的生活。
"The Olympics, like the World Cup and other mega events in Rio, are always a tense moment for residents of mare," she said, adding that police operations are often heavy handed.
她说，“奥运会和世界杯以及里约举办的其他盛事一样，对于马雷的居民们来说都是非常紧张的时刻。”她又补充说，警方的行动一般都非常严厉。
Volunteers recruitment started in 1992 for the Barcelona Olympics. With the ever-growing scale and dimensions of the Olympic Games, volunteers are now considered to be "mega events".
志愿者的招募始于1992年巴塞罗那奥运会，随着奥运会规模的日益增大，志愿者已被看成是每届奥运会的大事。
These mega Asian cities are now facing greater risks from extreme weather events, thanks to climate change.
这些亚洲超级城市现在都面临来自极端天气事件的风险增大，罪魁祸首是气候变化。
Over the past 540 million years, five mega-wipeouts of species have occurred through naturally-induced events.
在过去的五亿四千万年里，由于自然大事件，已发生过五次大规模的物种灭绝。
The macro-economic environment is an important factor that affects the mega-events, at the same time the mega-events can also alleviate the economic crisis as an effective policy tool.
宏观经济环境是影响大事件的重要外部因素，大事件也可成为有效缓解经济危机的政策工具。
Olympics as a kind of mega-events will have great impact on tourist destination.
奥运会作为一项大型节事，会对举办地的旅游业产生重大影响。
This conclusion also fits to the economic assessment of mega-events in the case of a larger economic scale and is of certain referential significance to managers and participants of mega-events.
总体上来说，研究证实，北京奥运会的经济影响在微观层面是有限的，这一结论适用于经济总量较大情况下重大节事的经济影响评价，对于重大节事的管理与参与有一定的借鉴意义。
This conclusion also fits to the economic assessment of mega-events in the case of a larger economic scale and is of certain referential significance to managers and participants of mega-events.
总体上来说，研究证实，北京奥运会的经济影响在微观层面是有限的，这一结论适用于经济总量较大情况下重大节事的经济影响评价，对于重大节事的管理与参与有一定的借鉴意义。
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