He was a quiet man who always kept to himself.

他不爱说话，总是独来独往。

《柯林斯英汉双解大词典》

He was a quiet man with very decided opinions;

他是一个沉着的人，想法非常坚决。

youdao

Judged by his external appearances he was a quiet man, but he had a violent temper.

从外表看，他是个文静的人，但实际上他脾气很暴躁。

youdao

He also was a quiet man, except when he talked about space.

VOA: special.2009.07.15

He was a quiet man who just got on with his job, his rugby, his life and his family.

BBC: Rugby star Purdham's tribute to Cumbria victim brother

He was a quiet man who wore thick-framed glasses and collared shirts, which he tucked into his jeans, and when he spoke to people he listened carefully, as if they were giving him directions.

NEWYORKER: Temporary

Friends said he was a "quiet, friendly" man who was a keen sportsman and credit to his community.

BBC: Dulverton post office