A country's coastline is the outline of its coast.
例句
This is some of the most exposed coastline in the world...這里的海岸線屬于世界上最無遮蔽的一段了。Thousands of volunteers gave up part of their weekend to clean up the California coastline.幾千名志愿者放棄周末的部分休息時間,來清理加利福尼亞州的海岸。
英漢詞典釋義
n.
海岸線;海岸地形 (或輪廓);沿海地帶
The road follows the Pacific coastline.公路沿著太平洋海岸線延伸。The sea is eating away the coastline.海水侵蝕著海岸線。They sailed along the rugged coastline.他們沿著多巖石的海岸線航行。