there are several islands off the south coast.应该怎么翻译?为什么用off

"There are hundreds of islands ________ the coast Fujian,the off the coast located off the coast an island off the west coast of Italy翻译,另外这里的off 怎么理解? Japan is made up of islands that lie off the coast of Asia. on the coast ,off the coast off the coast 中的 off什么意思 off the coast of mexicos in the coast ,on the coast ,off the coast区别 the ocean floor off the coast of Costa Rica.翻译 请翻译：a small island off the coast of Scotland 英语翻译A small town in Tasmania,an island off the south coast o