It's not a pleasant feeling to discover you've been taken for a ride by someone you trusted.

发现被你信任的人骗了，心里很不是滋味。

《牛津词典》

When people do something new or risky, a chemical (化学物质) in the brain creates a pleasant feeling.

人们尝试新鲜事物或是冒险性举动时，大脑中的某种化学物质会让人产生愉快感。

youdao

The most pleasant feeling of inner calm.

最愉悦的感觉，内心平静。

youdao

It was a pleasant feeling.

VOA: special.2010.07.10

They hardly sparkle with the sunshine pop of the Beach Boys or the gleaming funk of Dr. Dre, but Feist's pleasant brand of melancholy strikes the right mood for winding in (Unintelligible) city, feeling comfortably lost and alone.

NPR: Hearing a Breakthrough: Feist's 'Reminder'