为什么有雾霾:沿海城市，如何翻译地道呢，谢谢！

沿海城市 可以这样翻译
coastal city ====The city along the coast
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例:
The coastal city（沿海城市） of Ningbo in East China’s Zhejiang Province（省） announced（宣布） recently it would build China’s first semi-conductor（半导体） utilization district（利用区）. Covering（占地…） 900,000 square metres（平方米）, the district（区域）, within the city’s development zone（开发区）, will focus on（着重） the packaging of chips（芯片包装） for mobile communications（移动通信）, industrial control（工业控制） and home appliances（家用器具）.

In three to five years, the district will hopefully（有望） account for（占） 15 per cent of the packaging volume（包装量） in the country. The industry, together with chip designing（设计） and manufacturing（生产）, will become a pillar（支柱） of the micro-electronics industry（微电子产业）.

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沿海城市与农村学龄儿童行为问题及相关因素的对照研究
The control study of behavior problem and relative factors on coastal city and country children aged in school

inshore city

a coastal city
或 coastal cities

coastal cities and tourist hubs
沿海城市和旅游中心