在他三十多岁时 in his thirties
他十三岁了. he's thirteen
在他三十几岁时 While in his thirties
他三十多岁才开始教书 He began teaching thirties
他今年三十二岁 he is thirty-two
在他三十五岁左右时 in his mid-thirties
在他十/三十多岁时 in his teens/thirties
他三十岁
He is thirty years old.
以上为机器翻译结果，长、整句建议使用 人工翻译 。
他三十岁那年被癌症夺去了性命。
He was struck down by cancer at the age of thirty.
《牛津词典》
他三十岁时当了老师。
When he was thirty, he became a teacher.
youdao
他三十岁的时候已经是一位很有名的银行家了。
He was a well-known banker by the time he was only 30.
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