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会导致认知损伤。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.

该病会造成患者体内睾酮水平降低以及LH和FSH水平升高，以上均会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.

你看到灯上的这个小覆盖物是为了确保即使你触摸它，你仍然保持无菌状态。

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。