Broilers have breast muscles which are too big for their bones to support, leading to lameness.

肉鸡的胸肌太大，骨头无法支撑，导致跛足。

Pectoralis major, which is the breast muscle, and also the femoralis, which is the big muscle on your thigh.

胸大肌，也就是胸肌，还有股骨肌，也就是大腿上的大块肌肉。

Those birds are kept in low, repressive cages, forced to be hunched over all the time, which makes the breast muscles very big.

这些鸡被关在狭窄压抑的笼子里，不得不一直弓着身体，这使它们的胸脯肌肉变得很大。

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。