a person who is of equal standing with another in a group
造句
A unit of weight for precious stones, equal to 200 milligrams. 克拉寶石的重量單位，等于200毫克。
A unit of length equal to one hundred-millionth(10-8) of a centimeter, used especially to specify radiation wavelengths. 埃長度單位，等于一厘米的百萬分之一(10－8), 用來記錄輻射波長
The cardinal number equal to109. 十億基數(shù)，等于109
The cardinal number equal to1015. 十的十五次冪基數(shù)等于1015。