he.don.ics

n.(used with a sing. verb)（名詞）（與單數(shù)動(dòng)詞連用）
The branch of psychology that studies pleasant and unpleasant sensations and states of mind.
快感學(xué)：心理學(xué)的一個(gè)分支，研究快樂(lè)和不快樂(lè)的感覺(jué)及大腦狀態(tài)
Philosophy The branch of ethics that deals with the relation of pleasure to duty.
【哲學(xué)】 快樂(lè)說(shuō)：倫理學(xué)分支，研究快樂(lè)和義務(wù)的關(guān)系