总的来说，对比这四张图海峡的变化还是很明显的，从刚开始的小部分被侵蚀到

Overall, the comparison of these four change map Straits is still very evident, from the small part of the beginning of the erosion of the island to the last eroded to separate, to some of the island now has to be drowned by the sea, visible powerful power of the sea.

Overall, the contrast between the four Tu straits is still evident, from the initial partial erosion to the eventual erosion to the separation of the islands, to the fact that some of the small islands are now already submerged by the sea, showing the power of the sea.

Generally speaking, compared with the four charts, the changes in the Straits are still very obvious. From the beginning when a small part was eroded to the end when the islands were separated, to now when some of the islands have been submerged by the sea water, it can be seen that the power of the sea water is powerful.