近三十岁的；三十岁左右的

He was medium height, about thirtyish. 事情发生得太突然了，我不记得了。

The billboard pictured a handsome, thirtyish man smoking a cigarette. 在这个广告牌是一位30岁左右的英俊男子在抽烟的照片。

You probably remember Yao Chin-feng: tall and thin, little round face, slightly pockmarked, thirtyish, been here three years and six months? Well, as a matter of fact it was she who started the strike." 你大概还记得这个姚金凤吧?瘦长条子，小圆脸儿，有几点细白麻粒，三十多岁，在厂里已经三年零六个月，这次怠工就是她开火的”

" Thirtyish Zhu Xun, manager of the Shanghai office of a German air-conditioning firm, raised his glass of white wine at the chic Golden Age club in a fitting toast: "Thank you, Comrade Deng. 在一个高档的老年人俱乐部聚会上，德资空调公司上海办事处的经理，三十来岁的朱迅举起杯中的白葡萄酒，“谢谢你，小平同志”，他说“中国不太可能出现大的动荡，因为所有人都享受着邓小平政策的遗产”。