所有这些类型胡萝卜都是经过专门繁殖。

All of these types of carrot have been specially bred.

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科学家们说，如果这两种鸟类已经繁殖了的话，他们将早已发现遗传学上的“中间类型”——即来自这两个物种的基因的麻雀。

If the birds had been breeding, the scientists say that they would have found genetic "intermediates" - birds with genes from both species.

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测定分析鱼类生殖力、产卵期、繁殖群体的年龄结构及产卵类型。

The spawning times, absolute fecundities, age structures of breeding population, and spawning types of fish were also studied.

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