The association also said that standards of training must be raised among flight crews and air traffic controllers as the sky has become ever more crowded.

该协会还表示，必须提高机组人员和空中交通管制员的培训标准，因为空中交通越来越拥挤。

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MANY car designers are convinced that a radical change in automobile technology is going to be needed for the crowded megacities of the future.

很多汽车设计师相信未来拥挤的大都市必将彻底改变汽车技术。

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Thousands of people would be forced to migrate from the coast to increasingly impoverished and crowded urban areas inland.

成千上万的人将被迫从沿海地区迁移到正越来越贫穷及拥挤的内陆城市地区。

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For example, companies are sitting on so much cash at the moment that there is little risk that private investment will be crowded out by lots of government borrowing.

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One of those crowded movies that want to be read like a book of connected short stories.

NEWYORKER: Playing by the Heart

Everyone coming to Washington should know it's going to be crowded, says Kevin Griffis of the Presidential Inaugural Committee.

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