But the efforts in Mexico City, Shanghai, and Beijing's indicate that cities can make necessary changes to slow or stop the trend.

但是墨西哥市、上海、北京的经验表明，这些城市能够通过必要的决定来减缓或者停止这一趋势。

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In cities like Shanghai, Delhi, and Mexico City, analysts have emphasized the need for public transportation.

分析家强调，像上海、德里和墨西哥城这样的城市对公共交通的需求很大。

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I lived first in London for 2 months, before moving to Shanghai for a year and a half and finally to Mexico City for two years.

我首先在伦敦住了2个月，随后在上海待了2年半，最后去了墨西哥城，待了2年。

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China suspended flights into and out of Mexico after a 25-year-old Mexican man who arrived in Shanghai from Mexico City on April 30 became China's first confirmed case of swine flu.

CNN: Mexico lowers swine flu alert as businesses in capital reopen

China suspended all flights into and out of Mexico after a 25-year-old Mexican man who arrived Thursday in Shanghai from Mexico City became the Asian country's first confirmed case of the virus.

CNN: Second U.S. death linked to swine flu, officials say

In China, officials have quarantined 68 people, including 13 crew members, who were passengers of a Mexico City to Shanghai flight, which carried a passenger who tested positive for the virus, China's state-run Xinhua news agency reported Sunday.

CNN: Confirmed cases of H1N1 virus approach 900