關於Coastline的意思和用法的提問

A: An outline of a coast, but especially with regard to its shape and appearance.

A: the end of the sea and begining of the land

A: They are very similar. Most of the time they are interchangeable. Coast may be more casual for everyday speaking. Ex. ‘I like to walk along the coast’
‘The coastline is x miles long’

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A: It's grammatically correct, but I think it's a bit weird because there are many coast"lines" in the world. A line has to be continuous, and since the coasts of North America and Europe aren't connected they can't be considered one coastline.

There's the same issue with mountains, because mountains are almost always in groups. If you said "the mountain is one of the most alluring..." it would sound like it's referring to one specific mountain like Mount Everest.

You can say this with flowers. "The flower is one of the planet's most interesting plant structures" for example. "The cell phone is one of humanity's greatest inventions."

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A: Sounds good!👍