He's described as around thirty years old, six feet tall and of medium build.

他被描述为大约三十岁，身高6英尺，体格中等。

《柯林斯英汉双解大词典》

He was aged between 25 and 30, with a medium build and collar-length mousy hair.

他年龄在25到30岁之间，中等体格，有一头长至衣领的暗棕色头发。

《柯林斯英汉双解大词典》

She had an open face and pale skin, a medium build and an unassuming manner.

她神情坦然，肤色白皙，体形中等，态度谦逊。

youdao

He was of medium height and build and was politely spoken.

BBC: Woman, 95, robbed in her Newlands home

The man is described as white, about 6ft tall, of medium build and in his early to mid 30s.

BBC: Thief in Guildford takes phones worth ?17,000

He is of medium build and was wearing a dark hooded sweatshirt with the hood pulled tight across his face.

BBC: Police warn 'lock car doors' after attack on woman