She defeats human labour in the former, by her sterility; in the latter she makes it unnecessary, by her luxuriance.

前者它的不孕战胜了人类劳动，后者她的繁茂则使得人类劳动变得可有可无。

Animal studies suggest puberty blockers may cause cognitive damage, too. Cross-sex hormones have been linked to heart disease, strokes and sterility.

动物研究表明，青春期阻断剂也可能导致认知损伤。跨性别激素与心脏病、中风和不育有关。

Why should the degree of sterility be innately variable in the individuals of the same species?

为什么不育程度在同一物种的个体中应该是先天可变的？

This leads to reduced testosterone levels and elevated luteinizing hormone and follicle stimulating hormone, all of which causes male sterility and feminized physical features.

该病患者体内睾酮水平降低以及LH和FSH水平升高，以上均导致男性不育和外观女性化。

Between the sterility thus superinduced and that of hybrids, there are many points of similarity.

在如此超诱导的不育性和杂种的不育性之间， 有许多相似点。

You see this little covering on the light is to make sure that even when you touch it, you still maintain your sterility.

灯上的这个小覆盖物是为了确保即使触摸它，仍然保持无菌状态。

In regard to the sterility of hybrids, in which the sexual elements are imperfectly developed, the case is somewhat different.

关于性要素发育不完全的杂种的不育性， 情况有些不同。

Now do these complex and singular rules indicate that species have been endowed with sterility simply to prevent their becoming confounded in nature?

现在，这些复杂而奇异的规则是否表明物种被赋予不育性只是为了防止它们在自然界中变得混乱？

In both cases the sterility is independent of general health, and is often accompanied by excess of size or great luxuriance.

在这两种情况下， 不育与一般健康状况无关， 并且通常伴随着体型过大或过度肥大。

It can thus be shown that neither sterility nor fertility affords any certain distinction between species and varieties.

因此可以表明， 无论是不育性还是生育力都不能提供物种和变种之间的任何特定区别。

This distinction is important, when the cause of the sterility, which is common to the two cases, has to be considered.

当必须考虑两种情况共有的不育原因时， 这种区别很重要。

The authorities in Kenya have launched a nationwide tetanus immunization campaign despite stiff opposition from the Catholic Church which alleges the vaccine can cause sterility in woman.

肯尼亚当局发了一场全国性的破伤风免疫接种运动，尽管天主教强烈反对该疫苗可能导致女性不育。

The view commonly entertained by naturalists is that species, when intercrossed, have been specially endowed with sterility, in order to prevent their confusion.

博物学家普遍持有的观点是， 物种在杂交时被特别赋予了不育性， 以防止它们混淆。

We will now consider a little more in detail the laws governing the sterility of first crosses and of hybrids.

我们现在将更详细地考虑控制第一次杂交和杂种不育的规律。

But it is impossible to resist the evidence of the existence of a certain amount of sterility in the few following cases, which I will briefly abstract.

但在我将简要概括的以下几个案例中， 无法抗拒存在一定程度不育的证据。

And in this case, it is not at all surprising that the inherent sterility in the hybrids should have gone on increasing.

在这种情况下， 杂交种固有的不育性继续增加也就不足为奇了。

It will be advisable to explain a little more fully, by an example, what I mean by sterility being incidental on other differences, and not a specially endowed quality.

最好通过一个例子更全面地解释一下我所说的不育是其他差异的偶然性， 而不是一种特殊的天赋。

The evidence is at least as good as that from which we believe in the sterility of a multitude of species.

证据至少与我们相信大量物种不育的证据一样好。

The above view of the sterility of hybrids being caused by two constitutions being compounded into one has been strongly maintained by Max Wichura.

上述关于杂种不育的观点是由两种体质合二为一的， Max Wichura 一直坚定地坚持这一观点。

The degree of sterility does not strictly follow systematic affinity, but is governed by several curious and complex laws.

不育程度并不严格遵循系统亲和性， 而是受几个奇怪而复杂的规律支配。