off the coast 中的 off什么意思

off the coast 中的 off什么意思 off the coast located off the coast on the coast ,off the coast off the coast of mexicos in the coast ,on the coast ,off the coast区别 on the coast 和off the coast的区别 off the coast 和on the coast 的区别 off the coast与on the coast的区别 off the coast 和near the coast 有区别吗 on the coast与off the coast有什麽不同 off the southeast coast of mainland