suggestion作为建议不可数。suggestion作为提议、建议的内容（注意、计划、人选...），微量、征象时为可数。
例句：
Its just a suggestion.
这只是一个建议。
Why didnt you act on her suggestion?
你为什么没有按照她的建议去做呢？
扩展资料
Her order was phrased as a suggestion.
她的命令措辞好像是一项建议。
Dont laugh, its a serious suggestion.
别笑，这是一条严肃的建议。
He agreed to her suggestion begrudgingly.
他不情愿地接受了她的建议。
