科幻小说家在英语中的表达是 "science fiction writer"。
来源："science fiction" 是科幻小说的英文称呼，它是由 "science" 和 "fiction" 两个词组合而成。"science" 指的是科学，"fiction" 指的是小说。而 "writer" 是指作家的意思。
英文例句及其中文翻译：
"Isaac Asimov was a renowned science fiction writer." (艾萨克·阿西莫夫是一位著名的科幻小说作家。)
"The science fiction writer imagined a world where robots were the dominant species." (这位科幻小说作家设想了一个机器人成为主导物种的世界。)
"She dreamed of becoming a science fiction writer since she was a child." (她从小就梦想成为一名科幻小说作家。)