raise money for charity为何不用复数?

慈善 意思为慈善事业时是不可数的名词,从来都不用charties 只有指慈善机构 才可以说charties 意为几个慈善机构charity ['t∫æriti] n。【宗】基督徒间的爱,博爱 施舍 慈善事业,慈善团体 宽厚,宽容 a charity performance 义演 习惯用语 be (as) cold as charity 象慈善机关对穷人一样冷淡,极其冷漠无情 in charity 出于恻隐之心 对。。。有好感(with) out of charity (with) 对。。。没有好感 C-begins at home。[谚]施舍先及亲友; 先救济自己,再救济别人。名词 n。1。慈悲,仁爱,博爱;慈善[U] She gave the beggar some money out of charity。她出于慈善给乞丐一些钱。2。施舍;善举[U] Poor as they were,the old couple never asked for charity。老两口虽然很穷,但从不请求施舍。3。慈善团体,慈善事业[C] The rich lady left all her money to charities。那个阔太太把所有的钱都捐给慈善事业。The fire victims received food and clothes from several charities。火灾灾民从数个慈善团体收到食物和衣服。4。(对别人的)宽容,宽厚[U] 5。施舍物[C]