他身穿一件朴素而沾有泥点的制服。

He was attired in a plain, mud-flecked uniform.

《柯林斯英汉双解大词典》

他个子很高，穿着朴素。

He was very tall and plainly dressed.

《柯林斯英汉双解大词典》

卡门埃里西亚俩眼眯成一条逢，打量着他的脸，他穿着特朴素的衣服，头顶架一副太阳镜。

Carmen Elcira narrowed her eyes and studied his face. He was wearing the plainest of clothes, with sunglasses propped on his head.

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He kept himself solitary and chaste. He devoted himself to poetry.

他过着孤独朴素的生活，致力于诗歌创作。

耶鲁公开课 - 弥尔顿课程节选

When he was lodged he liked living in your basic Russian wooden, peasant house, such as you could find on the outskirts of Moscow.

当他要投宿时,他喜欢住在朴素的俄式农舍,就如你能在莫斯科郊外找到的那种

耶鲁公开课 - 欧洲文明课程节选