(1) suggestion是可数名词，表示意见，建议，提议，特指为了改进或解决某一问题而提出建议、办法等，但不一定正确，仅供参考。语气比advice客气、委婉。多用作可数名词，常和介词about,as to,at,on,by,with等搭配。如:This trip was made at his teachers suggestion.这次旅行是由他的老师建议组织的。By her mothers suggestion the contribution was raised.根据她妈妈的建议发起了募捐。
表示一条建议用a suggestion，一些建议是some suggestions,许多建议是many suggestions。
(2) advice表示忠告，意见，指点，是指具有丰富的知识、足够的经验、正确的判断力和明智的观点的人对另一个人的劝告或见解，既可以是对于严肃的事物，也可以对琐碎事情提出意见。advice经常带有客观性质，在实际应用中，凡是与自己没有关系，完全是为了对方而提出的意见或建议都可用advice。
advice是不可数名词表示一条建议是a piece of advice,一些建议是some advice:
On the doctors advice Amy is staying in bed.
Amy遵医嘱卧床休息。You must act with advice at present.目前,你一定要谨慎行事。
advice常和介词against,at,by,for,of,on,to,about,with等搭配。如:My advice to you is that you should treat your wife with more consideration.我给你的忠告是你要多体贴妻子。
It was only by my advice that she had given up the idea.在我的劝导下她才放弃了这个念头。