性比（sex ration）——性比是种群中雄性个体和雌性个体数目的比例。 受精卵的♂/♀大致是50：50，这叫第一性比。 由于种种原因，♂/♀比继续变化，到个体成熟时为正的♂/♀比例叫第二性比。 最后还有充分成熟的个体性比，叫第三性比。 性比对种群配偶关系及繁殖潜力有很大的影响。
网络释义专业释义
短语
放射性比度 [核] Specific activity ; specific radioactivity ; radioactivity specific
流动性比率 [会计] liquidity ratio ; Hui-Heubel Liquidity Ratio
线性比例 Linear Scale ; linear scaling
蛤异性比 anisotropy ratio
二向色性比 dichroic ratio
活性比 [地质] activity ratio
放射性比活度 specific activity ; specific radioactivity
一致性比率 Consistency Ratio ; CR
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sex ratio - 引用次数：69
In this paper we discussed the reasons for the change in sex ratio from 3 female : 1 male to 5 female : 1 male from the triploid female silkworm which is generated from a tetraploid female silkworm.
解释了过冷却处理诱发的四倍体后代三倍体蚕发生性比从3：1向5：1变化的现象。
参考来源 - 家蚕多倍体细胞遗传学研究 -
sex ratio - 引用次数：27 参考来源 - 基于粪便DNA的马鹿种群数量和性比the gender ratios - 引用次数：1 参考来源 - 辽宁沿海盐场卤虫种群组成的变化及两性种的分类地位研究
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双语例句原声例句
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So, if we compare the sulfur to the oxygen, the oxygen it turns out is more electronegative and that is what holds the negative charge in this molecule.
因此，如果我们来比一下硫和氧，氧应该有更高的电负性,而在这个分子中它确实有负的电荷。
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In fact, you're just a bit better than chance but you are better than chance at telling sexual orientation.
但你猜对的几率只比碰运气好一点点,猜对性取向的几率要比碰运气好一点点。
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Now that seems counterintuitive now because we think that a plant based diet may be more healthy for people than a meat based diet, but remember, that we're fighting off overnutrition and these folks were fighting off undernutrition.
现在看来似乎并非如此,因为我们认为,对于人类来说,植物性饮食比以动物性饮食更为健康,但是请记住,我们正在对抗营养过剩,而这些人们正在和营养不良作斗争
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