Definition: the first letter of a name, especially when used to represent a name Level: B1
他在页面底部写下了他名字的首字母P.M.R.
He wrote his ___initials, P.M.R., at the bottom of the page.
Paul M. Reynolds拒绝说出首字母'M'代表什么。
Paul M. Reynolds refused to say what the ___initial "M" stood for.
它是黑色的，里面还有我名字的首字母。
It was black and my ___initials were inside it.
