The result was something along the lines of the modern broiler chicken.

胜出者类似于现代肉用鸡。

John Glisson of the U.S. Poultry and Egg Association says broiler chickens are especially inactive by nature.

美国家禽和蛋类协会的成员约翰·格利森说，肉鸡天生不活跃。

The chickens of today are something like four times heavier than the original broiler chickens of the 1950s.

“现在的肉鸡，体重大约是20世纪50年代原版肉鸡的4倍。”

The broiler chicken, Bennett says, is now a symbol of how the biosphere is unrecognizable from its pre-human state.

贝内特说，这只肉用鸡现在是生物圈从其原始人类状态无法识别的一个象征。

With over 21 billion broiler chickens in existence, human production of the species has fundamentally reconfigured Earth's biosphere, researchers say.

研究人员称，人类生产的210亿只肉鸡从根本上改变了地球生物圈的结构。

Changing to broiler chickens that do not grow as big or as fast would mean using up more water and other resources.

如果改养成长慢，发育缓的肉鸡，意味着会消耗更多水和其他资源。

They say that broiler chickens – the most commonly used bird -- may not move around a lot because they do not have a lot of energy.

他们说，最常食用的鸟类——肉鸡可能不会常走动，因为它们没有太多的能量。

They considered that with over 21 billion broiler chickens in existence, the industrial production of this species would have had a major impact on the planet.

他们认为，超过210亿只肉鸡的存在使这这一物种的工业生产将对地球产生重大影响。

John Glisson of the U.S. Poultry and Egg Association says broiler chickens are especially inactive by nature.Some people may mistake the birds' inactivity for a medical problem.

美国家禽和蛋类协会的成员约翰·格利森说，肉鸡天生就不活跃。有些人会误认为这类鸡的不活跃是健康问题。

Further to this, broiler chickens cannot survive without " intensive human intervention" - its rapid growth of leg and breast muscle means its organs, including the heart and liver, are smaller than normal.

除此之外，肉鸡如果没有“密集的人类干预”是无法生存的——鸡腿和胸肌的快速增长意味着它的器官，包括心脏和肝脏，都比正常的要小。