addition line

基本解释

The molecular cytogenetics and disease resistance of addition line H20 and substitution line H1 from wheat-P.
对小麦-华山新麦草附加系H20和代换系H1的抗病性及分子细胞遗传学进行了研究。
Many progenies were obtained by a Brassica oleracea-Sinapis alba monosomic alien addition line plant selfing.
将甘蓝-白芥单体异附加系自交，获得了其自交后代。
A conclusion could be made that the alien addition chromosomes in the disomic addition line can steadily pass on to its offspring, which can be used for gene mapping.
表明该二体附加系的附加染色体能在杂种后代中稳定传递，不易因遗传排斥而丢失，可用来进行有关农艺性状的基因定位研究。
chazidian.com

If you're writing a one line function, whose sole purpose in life is addition, and, clearly, this is about addition, well, then it's, in fact, A reasonable to use a shorter symbol like A, but I do have to specify it's type.
如果你在写一个一行的函数，它唯一的目的是,做加法，显然这是关于加法的，好的，实际上，用一个短的标识符是合理的，像，但是我必须指明它的类型。
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