formality用来表示手续的时候是不是一般用复数形式?

formula:（名词）公式,准则,配方,方法
例：Sugar is represented by the simple formula CHO.糖用CHO这个公式表达
We're still searching for a peace formula.我们仍在寻求和平的方案.
Formula One 一级方程式赛车（注：这里其实是误译.这个短语原意是最高级别的国际汽车大奖赛,和方程式并无关系）
formulation:（名词） 构想,规划
例：the formulation of clear objectives规划清晰的目标
formal:（形容词）正式的
例：I've met her twice but only on formal occasions.我只在正式场合遇到过她两次.
We insist on formal dress for dinner.我们坚持正餐穿正装.
formality:（名词）礼节,仪式,正式手续
例:the formalities necessary for a valid marriage有效婚姻所必需的正式手续
The loan was arranged with little formality.贷款发放的一点都不正规.

正式程度
Stylistic synonyms文体同义词): Stylistic synonyms are words which have the same meaning but differ in style, or degree of formality.

formality
[fC:5mAliti]
n.
拘谨,礼节,仪式,正式手续,拘泥形式