极限爱好者可以被翻译为 "extreme enthusiast" 或 "extreme hobbyist"。这个词是用来形容一个人对某个特定的爱好有着极度的兴趣和热情，并且愿意去冒险和做出极端的努力来追求这个爱好。
例句：
"John is an extreme enthusiast of rock cpmbing. He spends every weekend cpmbing the tallest and most difficult cpffs he can find." (约翰是一个极限爱好者，他每周末都会去攀爬最高最难的悬崖。)
"Sara is an extreme hobbyist of collecting rare stamps. She spends hours every day scouring the internet and visiting stamp shows to find the most valuable stamps for her collection." (莎拉是一个极限爱好者，她每天花费几个小时在网上寻找和参加邮票展览来寻找最有价值的邮票。)
希望这些信息能帮到你！
例句：
"John is an extreme enthusiast of rock cpmbing. He spends every weekend cpmbing the tallest and most difficult cpffs he can find." (约翰是一个极限爱好者，他每周末都会去攀爬最高最难的悬崖。)
"Sara is an extreme hobbyist of collecting rare stamps. She spends hours every day scouring the internet and visiting stamp shows to find the most valuable stamps for her collection." (莎拉是一个极限爱好者，她每天花费几个小时在网上寻找和参加邮票展览来寻找最有价值的邮票。)
希望这些信息能帮到你！