關於Archipelagos的意思和用法的提問

A: When you use the word 'scratch/from scratch', it means that you're creating something without any material or ingredients prepared ahead of time (©Merriam-Webster).

For example, if someone says, 'I will make a meal from scratch', it means that she/he will cook a meal from raw and unprocessed ingredients, example home-made foods.

The article stated 'Dubai is a city where...archipelagos are built from scratch' since Dubai is known for their creation of man-made group of islands(archipelago) and they created it without using any natural island or any material that was built ahead of time.