大约三十岁用英文怎么说

"Approximately thirty years old" 用英语可以说成 "around thirty years old" 或 "about thirty years old"。这种表达方式源自英语中表示年龄的常用词汇和结构。

例句：

"He's around thirty years old." (他大约三十岁。)
"She's about thirty years old." (她大约三十岁。)
"I'm in my early thirties." (我三十岁出头。)