Correct or improve the translation of the following Chinese sent

Correct or improve the translation of the following Chinese sentences.原文：即将到来的21世纪是人类开发利用海洋的新世纪。译文：The coming 21st century is a new century which the mankind will have new opportunities to develop and utilize the ocean.改译：
【正确答案】：

IN THE COMING 21ST CENTURY MANKIND WILL HAVE NEW OPPORTUNITIES TO DEVELOP AND UTILIZE THE OCEAN.

【题目解析】：如果用定语从句的话，which前面应该加in；如果不用定语从句，可以将时间用介词结构表达。