There are numerous high buildings, heavy traffic, and dense population in modern cities.

现代都市到处高楼耸立，交通拥挤，人口稠密。

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But with its wide streets, dense population and a tradition of bus travel, Bogota had the ingredients for success.

不过，由于街道宽阔、人口密集，以及有乘坐公交旅行的传统，波哥大具有使快速公交成功的各种要素。

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When microscopic Marine organisms known as phytoplankton multiply into a dense population at the ocean's surface, massive blooms can spread so far that they can only be seen from space.

当微小的海洋浮游生物在海洋表面大量繁殖时，其壮观的场面甚至能从太空观察到。

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There are concerns about the city's low uptake of immunisations and its dense population causing measles to spread.

BBC: Cases of measles in London up on 2012 figures

This little yacht haven has a dense population of eight-figure investment portfolios, to judge from the interest and dividend income reported there.

FORBES: Millionaire Towns For Obama

But even in this paradise, away from the city, with its dense population, disease and social ills, the villagers can relate to the same matter, and that residents of large cities ...

UNESCO: Communication and Information