1、近代：modern。
例句：china has become a modern country for the past thirty years.
翻译：过去三十年中，中国已经变成了一个现代化的国家。
2、当代：contemporary。
例句：einstein was a contemporary outstanding talents.
翻译：爱因斯坦是一位当代杰出人才。
3、现代：modern。
例句：many people pretend that they understand modern art.
翻译：很多人都自称懂得现代艺术。