Domestic chickens are descended from jungle fowl of Southeast Asia.家鸡是由东南亚原鸡演变而来的。I have to feed the chickens and hoe the potatoes.我得喂鸡，还得为马铃薯锄草。I don't want to count my chickens before they are hatched.我不想高兴得太早。...
那是我自愿做的.I did it of my own free will , ie acting voluntarily.他自愿做这苦差使.He volunteered for the hard and unprofitable job.我是出于自愿做的.I did it of my own free will....