sadness、enerjetic和happiness是什么意思?

sadness、enerjetic和happiness是什么意思? happiness 和sadness有复数吗? share happiness and sadness with each How does happiness turns to sadness sadness always overpower the happiness that easy anthropologist have discoverd that fear .happiness .sadness happiness,sadness,tears...sky,stars...and my Anthropologists have discovered that fear,happiness,sadness 单词yogurt和happiness是什么意思? other side of sadness是什么意思 a heart of sadness是什么意思 happiness是什么意思?