英语翻译近年来,海洋主题公园发展迅速,是当今国内外旅游开发的热点.

近年来，海洋主题公园发展迅速，是当今国内外旅游开发的热点。
表达应该力求专业、流行，参考如下：
The park of subject of the ocean,which has been developing fast these years,is a key focus of the travel exploiting both at home and aboard.

In the recent few years, ocean theme parks have progressed rapidly and have been the focus of both international tourism and tourism within the country.

In the recent years,The theme parks have progressed rapidly ,which will become the focus of ecotourism development at home and abroad .
the focus of ecotourism development 旅游开发热点
at home and abroad 在国内外
用定语从句 会稍微简单些