Milarch said coast redwoods can reproduce themselves through a natural cloning process and by mating with other trees.

米拉克说，海岸红杉可以通过自然克隆过程自我繁殖，也可通过与其他树木杂交繁殖。

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That may often be the case in the natural as well as in the modern world, as successes in acquiring skills, material resources, social status, and even mating partners may all affect one another.

不仅在自然界，在现代社会，获取技能的成功与获得物质资源、社会地位，甚至和找对象都是环环相扣的。

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And so, late last night, the professor of pandas made a call: at last Tian Tian was hormonally ready but her behaviour was "not conducive" to natural mating.

BBC: How do you get a panda pregnant?

Scientists long ago discovered, for example, how to give crop plants new traits by forcibly mating them with unrelated wild species known to contain natural pesticides, carcinogens, and anti-nutrients.

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The explanation for this paradox, put forward by Leonardo Campagna of the Argentine Museum of Natural Sciences, is that they are incipient species, separated by the mating preferences of females but not yet by genetics.

WSJ: Matt Ridley on the Possible Formation of a Species | Mind & Matter