back cross

常見例句

Molecular marker assisted selection(MAS) can provide a rapid, accurate, and efficient tool for selecting target genes in back cross breeding.
分子標記輔助選擇（MAS）因其對目標基因的快速準確選擇為回交育種提供有效工具。
The experiments of cross and back cross showed that these mutations were belonged to recessive mutation of nucleus gene and controlled by a recessive monogene.
通過正反交試驗表明，大豆葉綠素缺失突變屬于核基因隱性突變，而且是由一隱性單基因所控制的。
The result indicated that the genetic construction of congenic inbred strains was similar with the parents through more than the 20th generation back cross mating except for destination gene.
結(jié)果表明，經(jīng)20代以上的回交，除目的基因外，均為輪回親本的遺傳組成。

The American Red Cross says a rescuer should first hit the person on the back five times between the shoulder bones.
And there's been some efforts cross-culturally, to go back to the question this young man asked before looking at cross-cultural differences in toilet training and weaning, which are really big differences, to see if they correspond in any interesting way to personality differences.
回到剛才那位同學(xué)提出的問題，確實也已經(jīng)有些跨文化的研究試圖探究,在如廁訓(xùn)練和斷奶上的跨文化差異,這些差異是非常大的，而這些研究的目的，是為了看看這些跨文化上的差異,是否與人格差異存在著某種聯(lián)系。
耶魯公開課 - 心理學(xué)導(dǎo)論課程節(jié)選
It's a more powerful method than something called a cross-sectional study, and I'll come back in a later lecture and talk about these in more detail, but a cross-sectional study means you're taking a snapshot of a population of people at one time.
這種方法比所謂的橫斷面研究更加有效,我將在以后的課中,再仔細討論這個問題,但橫斷面研究是指,你一次記錄下一群人的狀況
耶魯公開課 - 關(guān)于食物的心理學(xué)、生物學(xué)和政治學(xué)課程節(jié)選

It look like the 50 is going to cross back above it on a golden cross.
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It is financial protectionism, as banks are forced by their governments to focus on lending at home and to cut back on cross-border flows.
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