doublets
n. 紧身上衣,成对的东西( doublet的名词复数 )
A doublet was a short, tight jacket that was worn by men in the fifteenth, sixteenth, and early seventeenth centuries.
It was surprising when the alkali spectra showed unmistakable doublets.
当碱金属光谱显示出不容怀疑的双线结构时,是令人惊奇的.
The envelope is called a double of doublets.
这种峰叫做双合双重线.