Sterility

例句:

• The evidence is at least as good as that from which we believe in the sterility of a multitude of species. 查尔斯·达尔文. 物种起源.
• In both cases the sterility is independent of general health, and is often accompanied by excess of size or great luxuriance. 查尔斯·达尔文. 物种起源.
• The sterility of first crosses and of their hybrid progeny has not been acquired through natural selection. 查尔斯·达尔文. 物种起源.
• The above view of the sterility of hybrids being caused by two constitutions being compounded into one has been strongly maintained by Max Wichura. 查尔斯·达尔文. 物种起源.
• In regard to the sterility of hybrids, in which the sexual elements are imperfectly developed, the case is somewhat different. 查尔斯·达尔文. 物种起源.
• Some authors believe that long-continued domestication eliminates this strong tendency to sterility in species. 查尔斯·达尔文. 物种起源.
• Now do these complex and singular rules indicate that species have been endowed with sterility simply to prevent their becoming confounded in nature? 查尔斯·达尔文. 物种起源.
• What the methodically-minded do not see is that the sterility of a routine is far more appalling. 沃尔特·李普曼. 政治序论.
• We will now look a little closer at the probable nature of the differences between species which induce sterility in first crosses and in hybrids. 查尔斯·达尔文. 物种起源.
• The degree of sterility does not strictly follow systematic affinity, but is governed by several curious and complex laws. 查尔斯·达尔文. 物种起源.
• From this extreme degree of sterility we have self-fertilised hybrids producing a greater and greater number of seeds up to perfect fertility. 查尔斯·达尔文. 物种起源.
• The agitation has a curious sterility: the people are exhorted to control their own government, but they are given very little advice as to what they are to do with it when they control it. 沃尔特·李普曼. 政治序论.
• But in these and in many other cases, Gartner is obliged carefully to count the seeds, in order to show that there is any degree of sterility. 查尔斯·达尔文. 物种起源.
• Why should the degree of sterility be innately variable in the individuals of the same species? 查尔斯·达尔文. 物种起源.
• It can thus be shown that neither sterility nor fertility affords any certain distinction between species and varieties. 查尔斯·达尔文. 物种起源.

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