Successful breeding requires quiet, peaceful conditions with as little disturbance as possible.

成功繁殖需要安宁的环境，干扰越少越好。

《柯林斯英汉双解大词典》

It reproduces incredibly quickly, breeding up to 12 generations per year if conditions are favorable.

它的繁殖速度快得令人难以置信，在条件适宜时，一年可繁殖12代。

youdao

Most dog lovers know about the often horrid conditions of puppy mills, the unregulated breeding facilities owned by disreputable breeders.

大多数的爱狗人士大都对幼犬滥育厂里的糟糕状况略有所知，声名狼藉的繁育员和他的不规范的繁育设施。

youdao

They have been using conventional breeding methods to develop and test soybeans that can grow well under dry conditions.

VOA: special.2009.03.23

They have been using traditional breeding methods to develop soybeans that can grow well under dry conditions.

VOA: special.2009.01.20

Mosquitoes will thrive in the higher temperatures, and predicted increases in winter rainfall would provide ideal breeding conditions.

BBC: Why tropical diseases pose a threat

The BBKA warned the worst may be yet to come, as a lack of food for bees and wet conditions mean breeding queens have been unable to produce a large enough brood to see colonies through the winter.

BBC: Honey harvest 'devastated' by wet summer

And these conditions left a generation disillusioned, and made this region a breeding ground for extremism.

NPR: Bush Addresses U.N. on Peace in Middle East