形容詞 psychological:

1. mental or emotional as opposed to physical in nature
2. of or relating to or determined by psychology

1. Is there any possible psychological explanation for his bad health?
   ＂他健康狀況不好，有沒(méi)有可能具有什么心理上的原因呢？＂
2. Inhibition of natural impulses may cause psychological problems.
   壓抑自然的沖動(dòng)可能會(huì)引起心理上的問(wèn)題。
3. There could be some psychological explanation for his bad health.
   他的健康不佳可能有心理上的原因。

psy.cho.log.i.cal

adj.Abbr. psych.,psychol.（形容詞）縮寫(xiě) psych.,psychol.
Of or relating to psychology:
心理學(xué)的或與心理學(xué)有關(guān)的：
例句：
psychological research; psychological jargon.
心理學(xué)研究；心理學(xué)術(shù)語(yǔ)

Of, relating to, or arising from the mind or emotions.
心理的：心靈或情感的，與其有關(guān)的或由其引起的
Influencing or intended to influence the mind or emotions:
影響或用來(lái)影響心靈或情感的：
例句：
psychological warfare.
心理戰(zhàn)

Color Of or being any of certain primary colors whose mixture may be subjectively conceived as producing other colors.
【色彩】 心理色的：某些原色的，這些原色的混合能使人主觀地認(rèn)為產(chǎn)生了別的顏色

【引伸】
psy.cholog.ically
adv.（副詞）