we all like to feel needed,but new research suggests having

we all like to feel needed,but new research suggests having a sense of purpose is good for our health,too.
我们都喜欢被需求做事,但一个新的研究建议我们做事要有计划和意识这样对我们的身体有好处；怎么翻译的,我不明白用了all还有feel needed,needed 为什么加ed,suggests 是因为三单吗,having是因为前面是有动词吗,那用tohave行吗,sense of purpose怎么翻译,它是单数吗,怎么后面不用are呢,too是也的意思吧