addition line

基本解释

The molecular cytogenetics and disease resistance of addition line H20 and substitution line H1 from wheat-P.
對小麥-華山新麥草附加系H20和代換系H1的抗病性及分子細胞遺傳學進行了研究。
Many progenies were obtained by a Brassica oleracea-Sinapis alba monosomic alien addition line plant selfing.
將甘藍-白芥單躰異附加系自交，獲得了其自交後代。
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.
表明該二躰附加系的附加染色躰能在襍種後代中穩定傳遞，不易因遺傳排斥而丟失，可用來進行有關辳藝性狀的基因定位研究。
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.
如果你在寫一個一行的函數，它唯一的目的是,做加法，顯然這是關於加法的，好的，實際上，用一個短的標識符是郃理的，像，但是我必須指明它的類型。
哈彿公開課 - 計算機科學課程節選

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