happiness 和sadness有复数吗?

happiness 和sadness有复数吗? sadness、enerjetic和happiness是什么意思? sadness 和 grief有什么区别? grief和sadness有复数形式吗? happiness,sadness,tears...sky,stars...and my share happiness and sadness with each How does happiness turns to sadness 英语短句语法问题看到一句话：Sadness hiding behind happiness.这里hiding 是什么语法,这句话是不是有语法错误啊? 急求有关happiness and sadness的英语文章 a good friend can s() your happiness and sadness You cannot appreciate happiness unless you have known sadness too. You cannot appreciate happiness unless you have known sadness too. “You cannot appreciate,happiness unless you have konwn sadness too. ”Share My Happiness And Sadness With You.“什么意思? sadness always overpower the happiness that easy求中文翻译 You cannot apprecite happiness unless you have known sadness. You cannot appreciate happiness unless you have known sadness too. share happiness and sadness with us.什么意思